To err is human also in so far as animals seldom or never err, or at least only the cleverest of them do so.

Man is always partial and is quite right to be. Even impartiality is partial.

Much reading has brought upon us a learned barbarism.

A man has virtues enough if he deserves pardon for his faults on account of them.

The thoughts written on the walls of madhouses by their inmates might be worth publicizing.

Man is a masterpiece of creation, if only because no amount of determinism can prevent him from believing that he acts as a free being.

What you have been obliged to discover by yourself leaves a path in your mind which you can use again when the need arises.