Exceptions are not always the proof of the old rule; they can also be the harbinger of a new one.

We don't believe in rheumatism and true love until after the first attack.

Whoever prefers the material comforts of life over intellectual wealth is like the owner of a palace who moves into the servants’ quarters and leaves the sumptuous rooms empty.

He who has trusted where he ought not will surely mistrust where he ought not.

Never strive, O artist, to create what you are not irresistibly impelled to create!

Nothing is less promising than precocity. A young thistle is more like a future tree than is a young oak.

When curiosity turns to serious matters, it's called research.