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?

What one has, one ought to use: and whatever he does he should do with all his might.

Favours out of place I regard as positive injuries.

Long life is denied us; therefore let us do something to show that we have lived.

There is no being of any race who, if he finds the proper guide, cannot attain to virtue.

We cannot employ the mind to advantage when we are filled with excessive food and drink.

It might be pardonable to refuse to defend some men, but to defend them negligently is nothing short of criminal.