pure reason Quotes

In the first place a philosophical proposition must be general. It must not deal specially with things on the surface of the earth, or within the solar system, or with any other portion of space and time. . . . This brings us to a second characteristic of philosophical propositions, namely that they must be a priori. A philosophical proposition must be such as can neither be proved nor disproved by empirical evidence. . . . Philosophy, if what has been said is correct, becomes indistinguishable from logic as that word has now come to be used.

The only thing that is good without qualification is a good will.

The spirit of philosophy is one of free inquiry. It suspects all authority. Its function is to trace the uncritical assumptions of human thought to their hiding places, and in this pursuit it may finally end in denial or a frank admission of the incapacity of pure reason to reach the ultimate reality.

But I cannot recite, even thus rudely, laws of the intellect, without remembering that lofty and sequestered class of men who have been its prophets and oracles, the high-priesthood of the pure reason, the Trismegisti, the expounders of the principles of thought from age to age.

To ride a bicycle is in itself some protection against superstitious fears, since the bicycle is the product of pure reason applied to motion. Geometry at the service of man! Give me two spheres and a straight line and I will show you how far I can take them. Voltaire himself might have invented the bicycle, since it contributes so much to man’s welfare and nothing at all to his bane. Beneficial to the health, it emits no harmful fumes and permits only the most decorous speeds. How can a bicycle ever be an implement of harm?

Kant's style is so heavy that after his pure reason, the reader longs for unreasonableness.

Sometimes I imagine colors as if they were living ideas, being of pure reason with which to communicate. Nature is not on the surface, it is deep down.

In every religion there is an element of the supernatural, varying with the influence of pure reason over its devotees.

The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience

Science, at bottom, is really anti-intellectual. It always distrusts pure reason, and demands the production of objective fact.

It will never be possible by pure reason to arrive at some absolute truth.

The analytical geometry of Descartes and the calculus of Newton and Leibniz have expanded into the marvelous mathematical method-more daring than anything that the history of philosophy records-of Lobachevsky and Riemann, Gauss and Sylvester. Indeed, mathematics, the indispensable tool of the sciences, defying the senses to follow its splendid flights, is demonstrating today, as it never has been demonstrated before, the supremacy of the pure reason.

It is fortunate, I think, that nature is not bounded by human reason and by laboratory work and experimentation, for by the laws of pure reason and by microscopic investigation, it might easily have been proved, long before this, that children could not be born.

Utility is the emotion pleading to be let into the house of pure reason and thereby enriching it.

Mathematics is the bold luxury of pure reason, one of the few that remain today.

The light dove, in free flight cutting through the air the resistance of which it feels, could get the idea that it could do even better in airless space. Likewise, Plato abandoned the world of the senses because it posed so many hindrances for the understanding, and dared to go beyond it on the wings of the ideas, in the empty space of pure understanding.