Notion without intuition is empty, intuition without notion is blind.

We find that the more a cultivated reason devotes itself to the aim of enjoying life and happiness, the further does man get away from true contentment.

We ourselves introduce that order and regularity in the appearance which we entitle "nature". We could never find them in appearances had we not ourselves, by the nature of our own mind, originally set them there.

We can judge the heart of a man by his treatment of animals.

If justice perishes, human life on Earth has lost its meaning.

Freedom can never be comprehended, nor even can insight into it be gained.

Honesty is better than any policy.