A life of peace, purity and refinement leads to a calm and untroubled old age.

. . . for until that God who rules all the region of the sky . . . has freed you from the fetters of your body, you cannot gain admission here. Men were created with the understanding that they were to look after that sphere called Earth, which you see in the middle of the temple. Minds have been given to them out of the eternal fires you call fixed stars and planets, those spherical solids which, quickened with divine minds, journey through their circuits and orbits with amazing speed.

Exercise and temperance can preserve something of our early strength even in old age.

The first duty of man is the seeking after and the investigation of truth.

We should never so entirely avoid danger as to appear irresolute and cowardly; but, at the same time, we should avoid unnecessarily exposing ourselves to danger, than which nothing can be more foolish.

Constant practice devoted to one subject often outdoes both intelligence and skill. - Assiduus usus uni rei deditus et ingenium et artem saepe vincit

There is, I know not how, a certain presage, as it were, of a future existence; and this takes the deepest root, and is most discoverable, in the greatest geniuses and most exalted souls.