Logic Quotes

The extraordinary courage and wisdom of Kant and Schopenhauer have succeeded in gaining the most difficult victory, the victory over the optimism concealed in the essence of logic-an optimism that is the basis of our culture.

As a rational being, he now places his behavior under the control of abstractions. He will no longer tolerate being carried away by sudden impressions, by intuitions.

For nothing is more democratic than logic; it is no respecter of persons and makes no distinction between crooked and straight noses.

Reason is the cause of our falsification of the evidence of the senses. In so far as the senses show becoming, passing away, change, they do not lie.

This freedom and heavenly cheer I have placed over all things like an azure bell when I taught that over them and through them no 'eternal will' wills. This prankish folly I have put in the place of that will when I taught: In everything one thing is impossible: rationality.

Fanatics are picturesque, mankind would rather see gestures than listen to reasons.

A casual stroll through the lunatic asylum shows that faith does not prove anything.

The irrationality of a thing is no argument against its existence, rather a condition of it.

The true logic of this world is in the calculus of probabilities.

Our societies are too enslaved to market logic, and everything risks being subject to self-interest and the quest for profit. Volunteering is prophecy and a sign of hope, because it bears witness to the primacy of gratuitousness, solidarity, and service to those most in need.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

There is no place in a fanatic's head where reason can enter.

Logic is a poor guide compared with custom.

We must beware of needless innovation, especially when guided by logic.

Fear is the enemy of logic.

My technique is the outcome of thinking for myself, of my own logic and approach; it is not borrowed from what others are doing.

The less we have, the more we give. Seems absurd, but it's the logic of love.

Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense.

The meaning of the living words that come out of the experiences of great hearts can never be exhausted by any one system of logical interpretation. They have to be endlessly explained by the commentaries of individual lives, and they gain an added mystery in each new revelation.

When people attempt to rebel against the iron logic of Nature, they come into conflict with the very same principles to which they owe their existence as human beings. Their actions against Nature must lead to their own downfall.