The highest point to which a weak but experienced mind can rise is detecting the weakness of better men.

Of all the inventions of man I doubt whether any was more easily accomplished than that of a Heaven.

Before we blame we should first see whether we cannot excuse.

An hour-glass is a reminder not only of time's quick flight, but also of the dust to which we must at last return

The natural scientists of the previous age knew less than we do and believed they were very close to the goal: we have taken very great steps in its direction and now discover we are still very far away from it. With the most rational philosophers an increase in their knowledge is always attended by an increased conviction of their ignorance.

Never undertake anything unless you have the heart to ask Heaven's blessing on your undertaking.

Man can acquire accomplishments or he can become an animal, whichever he wants. God makes the animals, man makes himself.