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

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.]

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

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.

Whoever, in middle age, attempts to realize the wishes and hopes of his early youth, invariably deceives himself. Each ten years of a man's life has its own fortunes, its own hopes, its own desires.