What can stop the determined heart and resolved will of man?

I am not a person of opinions because I feel the counter arguments too strongly.

A human being in perfection ought always to preserve a calm and peaceful mind and never to allow passion or a transitory desire to disturb his tranquility.

From my birth I have aspired like the eagle - but unlike the eagle, my wings have failed. . . . Congratulate me then that I have found a fitting scope for my powers.

It is hardly surprising that women concentrate on the way they look instead of what is in their minds since not much has been put in their minds to begin with.

To examine the causes of life, we must first have recourse to death.

Teach him to think for himself? Oh, my God, teach him rather to think like other people!