The very desire for guarantees that our values are eternal and secure in some objective heaven is perhaps only a craving for the certainties of childhood or the absolute values of our primitive past.

Only barbarians are not curious about where they come from, how they came to be where they are, where they appear to be going, whether they wish to go there, and if so, why, and if not, why not.

Science cannot destroy the consciousness of freedom, without which there is no morality and no art, but it can refute it.

Utopias have their value -- nothing so wonderfully expands the imaginative horizons of human potentialities -- but as guides to conduct they can prove literally fatal.

But to manipulate men, to propel them toward goals which you-the social reformers-see, but they may not, is to deny their human essence, to treat them as objects without wills of their own, and therefore to degrade them.

True knowledge is knowledge of why things are as they are, and not merely what they are.

Freedom for the wolves has often meant death to the sheep.