Whoever wishes to keep a secret must hide the fact that he possesses one.

God could cause us considerable embarrassment by revealing all the secrets of nature to us: we should not know what to do for sheer apathy and boredom.

What one has wished for in youth, in old age one has in abundance. [Ger., Was man in der Jugend wunscht, hat man im Alter die Fulle.]

It is not enough to have knowledge, one must also apply it. It is not enough to have wishes, one must also accomplish.

Who is the wisest man? He who neither knows or wishes for anything else than what happens.

If any man wishes to write a clear style, let him first be clear in his thoughts.