To save the world requires faith and courage: faith in reason, and courage to proclaim what reason shows to be true.

When you get over an infatuation, to fall for someone ever again seems so inconceivable that you imagine no one, not even a bug, that is not mired in disappointment.

Follow me, and I will make you fishers of men.

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

One must care about a world one will not see.

If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind.

Should I not be proud, when for twenty years I have had to admit to myself that the great Newton and all the mathematicians and noble calculators along with him were involved in a decisive error with respect to the doctrine of color, and that I among millions was the only one who knew what was right in this great subject of nature?

Justice is the first virtue of those who command, and stops the complaints of those who obey.

So this is something... we see happening... in the war in Ukraine. A lot of people raise the question, "Why are Ukrainians resisting the Russian invasion as ferociously as they are?" and there's been a little bit of a debate over whether this is due to the fact that Ukrain is democratic, a liberal democracy, and Russia is not, or whether it's simply a fight over sovereignty... I think that that's a false dichotomy because you really don't fight for liberalism as an abstract principle. You fight for it as it is embedded in... your nation... From my... frequent visits to Ukraine... I believe... that's what's really going on, that Ukrainians want their sovereignty, but the reason they want it so desperately is that they want to have a free Ukraine and not Putin's Ukraine, not a... centralized dictatorship, and that's why they're willing to fight so tenaciously.

All systems of morality are based on the idea that an action has consequences that legitimize or cancel it. A mind imbued with the absurd merely judges that those consequences must be considered calmly. It is ready to pay up. In other words, there may be responsible persons, but there are no guilty ones, in its opinion. At very most, such a mind will consent to use past experience as a basis for its future actions.

Now just as the historical gives occasion for the contemporary to become a disciple, but only it must be noted through receiving the condition from the God himself, since otherwise we speak Socratically, so the testimony of contemporaries gives occasion for each successor to become a disciple, but only it must be noted through receiving the condition from the God himself.

People often say to me, You don't know what a wife and mother feels. No, I say, I don't and I'm very glad I don't. And they don't know what I feel. ... I am sick with indignation at what wives and mothers will do of the most egregious selfishness. And people call it all maternal or conjugal affection, and think it pretty to say so. No, no, let each person tell the truth from his own experience.

The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error. But science is one of the very few human activities - perhaps the only one - in which errors are systematically criticized and fairly often, in time, corrected. This is why we can say that, in science, we often learn from our mistakes, and why we can speak clearly and sensibly about making progress there.

There is merely bad luck in not being loved; there is misfortune in not loving. All of us, today, are dying of this misfortune. For violence and hatred dry up the heart itself; the long fight for justice exhausts the love that nevertheless gave birth to it.

For the mockers are those who die comically, and God laughs at their comic ending, while the nobler part, the part of tragedy, is theirs who endured the mockery.

To expect, indeed, that the freedom of trade should ever be entirely restored in Great Britain, is as absurd as to expect that an Oceana or Utopia should never be established in it.

My theory was that we are all fundamentally 'multiple personalities', beginning with the baby and the child, and slowly developing into more complex selves. If, for some reason, we abruptly cease to develop -- through some trauma that undermines self-confidence -- all those potential personalities are stunted and repressed. And some accident or violent shock may give one of them the opportunity to 'take over'. This suggests, of course, that in some mysterious sense, our 'future' personalities are already there, in embryo, so to speak, and that they also develop as we mature. We move from personality to personality, as we might climb a ladder. The Beethovens and Leonardos got further up the ladder than most of us; yet even they failed to reach the top, as we can see if we study their lives.

We are not ostriches, and cannot believe that if we refuse to look at what we do not wish to see, it will not exist. This is especially the case when what we do not wish to see is what we wish to eat. If it were really indispensable, or, if not indispensable, at least in some way useful! But it is quite unnecessary ... And this is continually being confirmed by the fact that young, kind, undepraved people - especially women and girls - without knowing how it logically follows, feel that virtue is incompatible with beefsteaks, and, as soon as they wish to be good, give up eating flesh.

Intuitionism is not constructive, perfectionism is unacceptable.

At this very moment, I am suffering - as we say in French, j'ai mal. This event, crucial for me, is nonexistent, even inconceivable for anyone else, for everyone else. Except for God, if that word can have a meaning.

For some identify happiness with virtue, some with practical wisdom, others with a kind of philosophic wisdom, others with these, or one of these, accompanied by pleasure or not without pleasure; while others include also external prosperity. Now ... it is not probable that these should be entirely mistaken, but rather that they should be right in at least some one respect or even in most respects.

Commoners are weightless. But he was a royal bon vivant who, no matter what, always weighed 125 kilos. I would be very surprised if he didn't have a few pounds left.

I am often accused of expressing contempt and despising religious people. I don't despise religious people, I despise what they stand for. I like to quote the British journalist Johann Hari who said, "I have so much respect for you, that I cannot respect your ridiculous ideas."

The secret is that only that which can destroy itself is truly alive.

Young Schopenhauer, a zealous and thorough-going Kantian, tried to explain that light would cease to exist along with the seeing eye. "What!" he said, according to Schopenhauer's own report, "looking at him with his Jove-like eyes,"-"You should rather say that you would not exist if the light could not see you?"

The man who is fortunate in his choice of son-in-law gains a son; the man unfortunate in his choice loses his daughter also.

Intelligence is quickness to apprehend as distinct from ability, which is capacity to act wisely on the thing apprehended.

We appear to be faced with a general difficulty about psychophysical reduction. In other areas the process of reduction is a move in the direction of greater objectivity, toward a more accurate view of the real nature of things. ... The less it depends on a specifically human viewpoint, the more objective is our description. ...Experience itself, however, does not seem to fit the pattern. ... If the subjective character of experience is fully comprehensible only from one point of view, then any shift to greater objectivity - that is, less attachment to a specific viewpoint - does not take us nearer to the real nature of the phenomenon: it takes us further away from it.

In America I was liberated from a certain naïve belief in culture and attained the capacity to see culture from the outside. To clarify the point: in spite of all social criticism and all consciousness of the primacy of economic factors, the fundamental importance of the mind-"Geist"-was quasi a dogma self-evident to me from the very beginning. The fact that this was not a foregone conclusion, I learned in America, where no reverential silence in the presence of everything intellectual prevailed.

No one should forget: Eros alone can fulfill life; knowledge, never. Only Eros makes sense; knowledge is empty infinity; - for thoughts, there is always time; life has its time; there is no thought that comes too late; any desire can become a regret.

I can prove now, for instance, that two human hands exist. How? By holding up my two hands, and saying, as I make a certain gesture with the right hand, "Here is one hand," and adding, as I make a certain gesture with the left, "and here is another." And if, by doing this, I have proved ipso facto the existence of external things, you will all see that I can also do it now in numbers of other ways: there is no need to multiply examples.

It is the perfection of God's works that they are all done with the greatest simplicity. He is the God of order and not of confusion. And therefore as they would understand the frame of the world must endeavor to reduce their knowledge to all possible simplicity, so must it be in seeking to understand these visions.

Hayek fails to account either for the passion among intellectuals for equality, or for the resulting success of socialists and their egalitarian successors in driving the liberal idea from the stage of politics. This passion for equality is not a new thing, and indeed pre-dates socialism by many centuries, finding its most influential expression in the writings of Rousseau. There is no consensus as to how equality might be achieved, what it would consist in if achieved, or why it is so desirable in the first place. But no argument against the cogency or viability of the idea has the faintest chance of being listened to or discussed by those who have fallen under its spell.

Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.

They are in you and me; they created us, body and mind; and their preservation is the ultimate rationale for our existence. They have come a long way, those replicators. Now they go by the name of genes, and we are their survival machines.

Myth deprives the object of which it speaks of all history. In it, history evaporates.

Scientists try to eliminate their false theories, they try to let them die in their stead. The believer-whether animal or man-perishes with his false beliefs.

I can imagine no man who will look with more horror on the End than a conscientious revolutionary who has, in a sense sincerely, been justifying cruelties and injustices inflicted on millions of his contemporaries by the benefits which he hopes to confer on future generations: generations who, as one terrible moment now reveals to him, were never going to exist. Then he will see the massacres, the faked trials, the deportations, to be all ineffaceably real, an essential part, his part, in the drama that has just ended: while the future Utopia had never been anything but a fantasy.

Definition of design = Everyone designs who devise courses of action aimed at changing existing situations into preferred ones. The intellectual activity that produces material artifacts is no different fundamentally from the one that prescribes remedies for a sick patient or the one that devises a new sales plan for a company or a social welfare policy for a state.

Some old poet's grand imagination is imposed on us as adamantine everlasting truth, and God's own word! Pythagoras says, truly enough, "A true assertion respecting God, is an assertion of God"; but we may well doubt if there is any example of this in literature.

The audience, as ground, shapes and controls the work of art.

Opinion is ultimately determined by the feelings, and not by the intellect.

If... it be supposed that another way of measuring time is adopted... enunciation of the law would be... translated into another language... much less simple. So that the definition implicitly adopted by the astronomers may be summed up..: Time should be so defined that the equations of mechanics may be as simple as possible... [i.e.,] there is not one way of measuring time more true... only more convenient.

You can never plan the future by the past.

That, on the whole, if you have got the intrinsic qualities, you have got everything, and the preliminaries will prove attainable; but that if you have got only the preliminaries, you have yet got nothing. A man of real dignity will not find it impossible to bear himself in a dignified manner; a man of real understanding and insight will get to know, as the fruit of his very first study, what the laws of his situation are, and will conform to these.

I had better never see a book than to be warped by its attraction clean out of my own orbit, and made a satellite instead of a system. The one thing in the world, of value, is the active soul.

Renaissance Italy became a kind of Hollywood collection of sets of antiquity, and the new visual antiquarianism of the Renaissance provided an avenue to power for men of any class.

I speak truth, not so much as I would, but as much as I dare; and I dare a little the more as I grow older.