If you are going to build something in the air it is always better to build castles than houses of cards.

Cautiousness in judgment is nowadays to be recommended to each and every one: if we gained only one incontestable truth every ten years from each of our philosophical writers the harvest we reaped would be sufficient.

To do the opposite of something is also a form of imitation, namely an imitation of its opposite.

A man of spirit must not think of the word difficulty as so much as existing. Away with it!

A sure sign of a good book is that you like it more the older you get.

We accumulate our opinions at an age when our understanding is at its weakest.

Too much is unwholesome.