The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes. Therefore in medicine we ought to know the causes of sickness and health. And because health and sickness and their causes are sometimes manifest, and sometimes hidden and not to be comprehended except by the study of symptoms, we must also study the symptoms of health and disease. Now it is established in the sciences that no knowledge is acquired save through the study of its causes and beginnings, if it has had causes and beginnings; nor completed except by knowledge of its accidents and accompanying essentials. Of these causes there are four kinds: material, efficient, formal, and final.

I never will, by any word or act, bow to the shrine of intolerance, or admit a right of inquiry into the religious opinions of others.

The gradual spread of sterility in seeding plants would result in a global catastrophe that could eventually wipe out higher life forms, including humans, from the planet.

He marveled at the strange blindness by which men, though they are so alert to what changes in themselves, impose on their friends an image chosen for them once and for all. He was being judged by what he had been. Just as dogs don't change character, men are dogs to one another.

At bottom, as was said above, we are to consider Luther as a Prophet Idol-breaker; a bringer-back of men to reality. It is the function of great men and teachers.

The great end of life is not knowledge but action.

No human institution can endure unless supported by the Hand which supports all; that is to say, if it is not especially consecrated to Him at its origin. The more it is penetrated with the Divine principle, the more durable it will be. How strange is the blindness of men in our age! They boast of their knowledge, and are ignorant of everything, since they are ignorant of themselves. They know not what they are, nor what they can do. An invincible pride bears them on continually to overthrow every thing which they have not made; and in order to work out new creations, they separate themselves from the source of all existence. Jean-Jacques Rousseau has, however, very well said, Little, vain man, show me thy power, and I will show thee thy weakness. It might be said, with as much truth and more profit, Little, vain man, confess to me thy weakness, and I will show thee thy strength.

At the edge of life you feel that you are no longer master of the life within you, that subjectivity is an illusion, and that uncontrollable forces are seething inside you, evolving with no relation to a personal center or a definite, individual rhythm.

Small creatures die because larger creatures are hungry. How superior to this human confusion of greed and creed, blood and fire.

What a monument of human smallness is this idea of the philosopher king. What a contrast between it and the simplicity of humaneness of Socrates, who warned the statesmen against the danger of being dazzled by his own power, excellence, and wisdom, and who tried to teach him what matters most - that we are all frail human beings. What a decline from this world of irony and reason and truthfulness down to Plato's kingdom of the sage whose magical powers raise him high above ordinary men; although not quite high enough to forgo the use of lies, or to neglect the sorry trade of every shaman - the selling of spells, of breeding spells, in exchange for power over his fellow-men.

The public has lost the habit of movie-going because the cinema no longer possesses the charm, the hypnotic charisma, the authority it once commanded. The image it once held for us all - that of a dream we dreamt with our eyes open - has disappeared. Is it still possible that one thousand people might group together in the dark and experience the dream that a single individual has directed?

The blood of Jesus Christ can cover a multitude of sins, it seems to me.

I am glad (sayes Eleutherius) to see the Vanity or Envy of the canting Chymists thus discover'd and chastis'd; and I could wish, that Learned Men would conspire together to make these deluding Writers sensible, that they must no longe[r] hope with Impunity to abuse the World. For whilst such Men are quietly permitted to publish Books with promising Titles, and therein to Assert what they please, and contradict others, and ev'n themselves as they please, with as little danger of being confuted as of being understood, they are encourag'd to get themselves a name, at the cost of the Readers, by finding that intelligent Men are wont for the reason newly mention'd, to let their Books and Them alone: And the ignorant and credulous (of which the number is still much greater then that of the other) are forward to admire most what they least understand.

This great maxim of philosophy he had gathered by the teaching of nature alone - that man was created to work, not to speculate or feel or dream. Accordingly, he set his whole heart thitherwards. He did work wisely and unweariedly, and perhaps performed more with the tools he had than any man I now know.

Words are deeds.

He said they that were serious in ridiculous matters would be ridiculous in serious affairs.

I know of no country, indeed, where the love of money has taken stronger hold on the affections of men, and where the profounder contempt is expressed for the theory of the permanent equality of property.

The general co-operation of all members of society for the purpose of planned exploitation of the forces of production, the expansion of production to the point where it will satisfy the needs of all, the abolition of a situation in which the needs of some are satisfied at the expense of the needs of others, the complete liquidation of classes and their conflicts, the rounded development of the capacities of all members of society through the elimination of the present division of labor, through industrial education, through engaging in varying activities, through the participation by all in the enjoyments produced by all, through the combination of city and country - these are the main consequences of the abolition of private property.

An old fairy tale has it that science began with the rejection of superstition. In fact it was the rejection of rationalism that gave birth to scientific inquiry. Ancient and medieval thinkers believed the world could be understood by applying first principles. Modern science begins when observation and experiment come first, and the results are accepted even when what they show seems to be impossible.

Once you've dissected a joke, you're about where you are when you've dissected a frog. It's dead. 

Science seems to me to teach in the highest and strongest manner the great truth which is embodied in the Christian conception of entire surrender to the will of God. Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abysses nature leads, or you shall learn nothing. I have only begun to learn content and peace of mind since I have resolved at all risks to do this.

It is the private dominion over things that condemns millions of people to be mere nonentities, living corpses without originality or power of initiative, human machines of flesh and blood, who pile up mountains of wealth for others and pay for it with a gray, dull and wretched existence for themselves. I believe that there can be no real wealth, social wealth, so long as it rests on human lives - young lives, old lives and lives in the making.

Man's being is made of such strange stuff as to be partly akin to nature and partly not, at once natural and extranatural, a kind of ontological centaur, half immersed in nature, half transcending it.

So-called racial characteristics are not really racial at all but are due to the historical experiences of the communities in question.

Conversation is an art in which a man has all mankind for his competitors, for it is that which all are practising every day while they live.

The ethic of Reverence for Life prompts us to keep each other alert to what troubles us and to speak and act dauntlessly together in discharging the responsibility that we feel. It keeps us watching together for opportunities to bring some sort of help to animals in recompense for the great misery that men inflict upon them, and thus for a moment we escape from the incomprehensible horror of existence.

Few people who are not actually practitioners of a mature science realize how much mop-up work of this sort a paradigm leaves to be done or quite how fascinating such work can prove in the execution.

What a stupendous, what an incomprehensible machine is man! Who can endure toil, famine, stripes, imprisonment and death itself in vindication of his own liberty, and the next moment, be deaf to all those motives whose powers supported him through his trial, and inflict on his fellow men a bondage, one hour of which is fraught with more misery than ages of that which he rose in rebellion to oppose.

Men and women meet now to be idle. Is it extraordinary that they do not know each other, and that, in their mutual ignorance, they form no surer friendships? Did they meet to do something together, then indeed they might form some real tie. But, as it is, they are not there, it is only a mask which is there - a mouth-piece of ready-made sentences about the "topics of the day"; and then people rail against men for choosing a woman "for her face" - why, what else do they see?

The people should never be deceived, under any pretext or for any purpose. It would not only be criminal but detrimental to the revolutionary cause, for deception of any kind, by its very nature, is shortsighted, petty, narrow, always sewn with rotten threads, so that it inevitably tears and is exposed.

The hair is the finest ornament women have. . . . I like women to let their hair fall down their back, it is a most agreeable sight.

The origin of things, considered not as leading to anything, but in itself, contains the idea of First, the end of things that of Second, the process mediating between them that of Third. A philosophy which emphasises the idea of the One, is generally a dualistic philosophy in which the conception of Second receives exaggerated attention: for this One (though of course involving the idea of First) is always the other of a manifold which is not one. The idea of the Many, because variety is arbitrariness and arbitrariness is repudiation of any Secondness, has for its principal component the conception of First. In psychology Feeling is First, Sense of reaction Second, General conception Third, or mediation. In biology, the idea of arbitrary sporting is First, heredity is Second, the process whereby the accidental characters become fixed is Third. Chance is First, Law is Second, the tendency to take habits is Third. Mind is First, Matter is Second, Evolution is Third.

An evil may be real, tho' its cause has no relation to us: It may be real, without being peculiar: It may be real, without shewing itself to others: It may be real, without being constant: And it may be real, without falling under the general rules. Such evils as these will not fail to render us miserable, tho' they have little tendency to diminish pride: And perhaps the most real and the most solid evils of life will be found of this nature.

Recognition of the subjectivity of the qualities of sense is found in Galilei (and also in Descartes and Hobbes) in a form closely related to the principle underlying the constructive mathematical method of our modern physics which repudiates" qualities".

As long as we try to project from the relative and conditioned to the absolute and unconditioned, we shall keep the pendulum swinging between dogmatism and skepticism. The only way to stop this increasingly tiresome pendulum swing is to change our conception of what philosophy is good for. But that is not something which will be accomplished by a few neat arguments. It will be accomplished, if it ever is, by a long, slow process of cultural change - that is to say, of change in common sense, changes in the intuitions available for being pumped up by philosophical arguments.

The characteristic of the hour is that the commonplace mind, knowing itself to be commonplace, has the assurance to proclaim the rights of the commonplace and to impose them wherever it will. As they say in the United States: "to be different is to be indecent." The mass crushes beneath it everything that is different, everything that is excellent, individual, qualified and select. Anybody who is not like everybody, who does not think like everybody, runs the risk of being eliminated. And it is clear, of course, that this "everybody" is not "everybody." "Everybody" was normally the complex unity of the mass and the divergent, specialised minorities. Nowadays, "everybody" is the mass alone.

Love to his soul gave eyes; he knew things are not as they seem. The dream is his real life; the world around him is the dream.

Every true thinker for himself is so far like a monarch; he is absolute, and recognises nobody above him. His judgments, like the decrees of a monarch, spring from his own sovereign power and proceed directly from himself. He takes as little notice of authority as a monarch does of a command; nothing is valid unless he has himself authorised it. On the other hand, those of vulgar minds, who are swayed by all kinds of current opinions, authorities, and prejudices, are like the people which in silence obey the law and commands.

To receive applause for works which do not demand all our powers hinders our advance towards a perfecting of our spirit. It usually means that thereafter we stand still.

I never yet touched a fig leaf that didn't turn into a price tag.

"And your education! Is not that also social, and determined by the social conditions under which you educate, by the intervention, direct or indirect, of society, by means of schools, etc.? The Communists have not invented the intervention of society in education; they do but seek to alter the character of that intervention, and to rescue education from the influence of the ruling class."

Civilizations have always been pyramidal in structure. As one climbs toward the apex of the social edifice, there is increased leisure and increasing opportunity to pursue happiness. As one climbs, one finds also fewer and fewer people to enjoy this more and more. Invariably, there is a preponderance of the dispossessed. And remember this, no matter how well off the bottom layers of the pyramid might be on an absolute scale, they are always dispossessed in comparison with the apex.So there is always social friction in ordinary human societies. The action of social revolution and the reaction of guarding against such revolution or combating it once it has begun are the causes of a great deal of the human misery with which history is permeated.

Rights are, then, the fruits of the law, and of the law alone. There are no rights without law-no rights contrary to the law-no rights anterior to the law. Before the existence of laws there may be reasons for wishing that there were laws-and doubtless such reasons cannot be wanting, and those of the strongest kind;-but a reason for wishing that we possessed a right, does not constitute a right. To confound the existence of a reason for wishing that we possessed a right, with the existence of the right itself, is to confound the existence of a want with the means of relieving it. It is the same as if one should say, everybody is subject to hunger, therefore everybody has something to eat.

That man lives badly who does not know how to die well.

But Eudoxus the Cnidian, who was somewhat junior to Leon, and the companion of Plato, first of all rendered the multitude of those theorems which are called universals more abundant; and to three proportions added three others; and things relative to a section, which received their commencement from Plato, he diffused into a richer multitude, employing also resolutions in the prosecution of these.