Our minds are rendered buoyant by exercise.

Hours and days and months and years go by; the past returns no more, and what is to be we cannot know; but whatever the time gives us in which we live, we should therefore be content.

Calamus fortior gladio.

If the soul has food for study and learning, nothing is more delightful than an old age of leisure.

Let reason govern desire.

But if you should take the bond of goodwill out of the universe no house or city could stand, nor would even the tillage of the fields abide. If that statement is not clear, then you may understand how great is the power of friendship and of concord from a consideration of the results of enmity and disagreement. For what house is so strong, or what state so enduring that it cannot be utterly overthrown by animosities and division?

Thus nature has no love for solitude, and always leans, as it were, on some support; and the sweetest support is found in the most intimate friendship.