The wish to talk to God is absurd. We cannot talk to one we cannot comprehend — and we cannot comprehend God; we can only believe in Him.

Upon the solution of this problem, or upon sufficient proof of the impossibility of synthetical knowledge a priori, depends the existence or downfall of metaphysics.

All human knowledge begins with intuitions, proceeds from thence to concepts, and ends with ideas.

Freedom is the alone unoriginated birthright of man, and belongs to him by force of his humanity; and is independence on the will and co-action of every other in so far as this consists with every other person's freedom.

Out of the crooked timber of humanity, no straight thing was ever made.

Honesty is better than any policy.

If education is to develop human nature so that it may attain the object of its being, it must involve the exercise of judgment.