The fact that the general incidence of leukemia has doubled in the last two decades may be due, partly, to the increasing use of x-rays for numerous purposes. The incidence of leukemia in doctors, who are likely to be so exposed, is twice that of the general public. In radiologists the incidence is ten times greater.

By creating the world market, big industry has already brought all the peoples of the Earth, and especially the civilized peoples, into such close relation with one another that none is independent of what happens to the others. Further, it has co-ordinated the social development of the civilized countries to such an extent that, in all of them, bourgeoisie and proletariat have become the decisive classes, and the struggle between them the great struggle of the day. It follows that the communist revolution will not merely be a national phenomenon but must take place simultaneously in all civilized countries.

He blamed as severely what he thought a bad action, when the motive was a feeling of duty, as if the agents had been consciously evil doers. He would not have accepted as a plea in mitigation for inquisitors, that they sincerely believed burning heretics to be an obligation of conscience. But though he did not allow honesty of purpose to soften his disapprobation of actions, it had its full effect on his estimation of characters. No one prized conscientiousness and rectitude of intention more highly, or was more incapable of valuing any person in whom he did not feel assurance of it.

To ruminate upon evils, to make critical notes upon injuries, and be too acute in their apprehensions, is to add unto our own tortures, to feather the arrows of our enemies, to lash ourselves with the scorpions of our foes, and to resolve to sleep no more.

It would be too ridiculous to go about seriously to prove that wealth does not consist in money, or in gold and silver; but in what money purchases, and is valuable only for purchasing. Money no doubt, makes always a part of the national capital; but it has already been shown that it generally makes but a small part, and always the most unprofitable part of it.

Few new truths have ever won their way against the resistance of established ideas save by being overstated. 

You must die erect and unyielding.

I bow before the authority of special men because it is imposed upon me by my own reason. I am conscious of my inability to grasp, in all its details and positive developments, any very large portion of human knowledge. The greatest intelligence would not be equal to a comprehension of the whole. Thence results, for science as well as for industry, the necessity of the division and association of labor. I receive and I give - such is human life. Each directs and is directed in his turn. Therefore there is no fixed and constant authority, but a continual exchange of mutual, temporary, and, above all, voluntary authority and subordination.

Power is the near neighbour of necessity.

Men are never so likely to settle a question rightly as when they discuss it freely.

"We may ignore, but we can nowhere evade, the presence of God. The world is crowded with Him. He walks everywhere incognito."

Though the principles of the banking trade may appear somewhat abstruse, the practice is capable of being reduced to strict rules. To depart upon any occasion from these rules, in consequence of some flattering speculation of extraordinary gain, is almost always extremely dangerous, and frequently fatal to the banking company which attempts it.

Those only are happy (I thought) who have their minds fixed on some object other than their own happiness; on the happiness of others, on the improvement of mankind, even on some art or pursuit, followed not as a means, but as itself an ideal end. Aiming thus at something else, they find happiness by the way.

Struggling to be brief I become obscure.

In the constitution of that rational animal I see no virtue which is opposed to justice, but I see a virtue which is opposed to love of pleasure, and that is temperance.

By a clock we understand anything characterized by a phenomenon passing periodically through identical phases so that we must assume, by the principle of sufficient reason, that all that happens in a given period is identical with all that happens in an arbitrary period.

As all those have shown who have discussed civil institutions, and as every history is full of examples, it is necessary to whoever arranges to found a Republic and establish laws in it, to presuppose that all men are bad and that they will use their malignity of mind every time they have the opportunity; and if such malignity is hidden for a time, it proceeds from the unknown reason that would not be known because the experience of the contrary had not been seen, but time, which is said to be the father of every truth, will cause it to be discovered.

In both positivism and Heidegger-at least in his later work-speculation is the target of attack. In both cases the thought that autonomously raises itself above the facts through interpreting them and that cannot be reclaimed by them without leaving a surplus is condemned for being empty and vain concept-mongering.

Creatures inveterately wrong in their inductions have a pathetic but praiseworthy tendency to die before reproducing their kind.

How many women does one need to sing the scale of love all the way up and down?

If I had followed the multitude, I should not have studied philosophy.

Fire is the most tolerable third party.

The law of progress holds that everything now must be better than what was there before. Don't you see if you want something better, and better, and better, you lose the good? The good is no longer even being measured.

When things fall out opportunely for the person concerned, he is not apt to be critical about the how or why, his own immediate personal convenience seeming a sufficient reason for the strangest oddities and revolutions in our sublunary things.

The value of life lies not in the length of days, but in the use we make of them... Whether you find satisfaction in life depends not on your tale of years, but on your will.

The bourgeoisie has stripped of its halo every occupation hitherto honoured and looked up to with reverent awe. It has converted the physician, the lawyer, the priest, the poet, the man of science, into its paid wage labourers.

Clichés, stock phrases, adherence to conventional, standardized codes of expression and conduct have the socially recognized function of protecting us against reality.

Then I dreamed that one day there was nothing but milk for them and the jailer said as he put down the pipkin:'Our relations with the cow are not delicate-as you can easily see if you imagine eating any of her other secretions.' ... John said, 'Thank heavens! Now at last I know that you are talking nonsense. You are trying to pretend that unlike things are like. You are trying to make us think that milk is the same sort of thing as sweat or dung.' 'And pray, what difference is there except by custom?''Are you a liar or only a fool, that you see no difference between that which Nature casts out as refuse and that which she stores up as food?'

Abstract liberty, like other mere abstractions, is not to be found.

The functional regions of the brain which subserve physical agony, the "pain centres", and the mainly limbic substrates of emotion, appear in phylogenetic terms to be remarkably constant in the vertebrate line. The neural pathways involving serotonin, the periaquaductal grey matter, bradykinin, dynorphin, ATP receptors, the major opioid families, substance P etc all existed long before hominids walked the earth. Not merely is the biochemistry of suffering disturbingly similar where not effectively type-identical across a wide spectrum of vertebrate (and even some invertebrate) species. It is at least possible that members of any species whose members have more pain cells exhibiting greater synaptic density than humans sometimes suffer more atrociously than we do, whatever their notional "intelligence".

Although I consider our political world to be the best of which we have any historical knowledge, we should beware of attributing this fact to democracy or to freedom. Freedom is not a supplier who delivers goods to our door. Democracy does not ensure that anything is accomplished - certainly not an economic miracle. It is wrong and dangerous to extol freedom by telling people that they will certainly be all right once they are free. How someone fares in life is largely a matter of luck or grace, and to a comparatively small degree perhaps also of competence, diligence, and other virtues. The most we can say of democracy or freedom is that they give our personal abilities a little more influence on our well-being.

All forms of violence are quests for identity. When you live on the frontier, you have no identity. You're a nobody.

Civil government does by its nature include much that is mechanical, and must be treated accordingly. We term it indeed, in ordinary language, the Machine of Society, and talk of it as the grand working wheel from which all private machines must derive, or to which they must adapt, their movements.

If literature isn't everything, it's not worth a single hour of someone's trouble.

The revolution in scientific ideas just mentioned is primarily logical. It is due to recognition that the very method of physical science, with its primary standard units of mass, space, and time, is concerned with measurements of relations of change, not with individuals as such.

With respect to modern languages, French, as I have before observed, is indispensible. Next to this the Spanish is most important to an American. Our connection with Spain is already important and will become daily more so. Besides this the antient part of American history is written chiefly in Spanish.

Perhaps there is one chain [of inference] leading from the mental and the physical to a common source. It is conceivable in the abstract that if mental phenomena derive from the properties of matter at all, these may be identical at some level with nonphysical properties from which physical phenomena also derive. ...If there were such properties, they would be discoverable only by explanatory inference from both mental and physical phenomena. ... There would be properties of matter that were not physical from which the mental properties of organic systems were derived. This could still be called panpsychism.

To all this, someone is sure to object that life ought to subject itself to reason, to which we will reply that nobody ought to do what he is unable to do, and life cannot subject itself to reason. "Ought, therefore can," some Kantian will retort. To which we shall demur: "Cannot, therefore ought not." And life cannot submit itself to reason, because the end of life is living and not understanding.

When alterations in technical terms become necessary, it is desirable that the new term should contain in its form some memorial of the old one.

If one doesn't know his mistakes, he won't want to correct them.

Amongst so many borrowed things, I am glad if I can steal one, disguising and altering it for some new service.

I believe that the man choosing progress can find a new unity through the full development of all his human forces, which are produced in three orientations. These can be presented separately or together: biophilia, love for humanity and nature, and independence and freedom.

Truth springs from argument amongst friends.

The third of this kind of principles is : matter neither originates nor perishes; all the changes in the world concern form only ; a postulate which on the recommendation of common sense has spread through all philosophical schools, not because it is to be taken as having been found so, or as having been demonstrated by arguments a priori, but because if we were to admit that matter itself is fleeting and transitory, nothing at all that is stable and lasting would be left any longer to serve for the explication of phenomena according to universal and perpetual laws, and hence nothing at all would be left for the exercise of the intellect.

Even when nothing happens, everything seems too much for me. What can be said, then, in the presence of an event, any event?

I shall take leave to think the worse, rather of the practice of the men than of the book of God.

So much of our time is spent in preparation, so much in routine and so much in retrospect, that the amount of each person's genius is confined to a very few hours.