When you wish to instruct, be brief; that men's [children's] minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.

There is no moment without some duty.

Brevity is a great charm of eloquence.

For how many things, which for our own sake we should never do, do we perform for the sake of our friends.

For one day spent well, and agreeably to your precepts, is preferable to an eternity of error.

The roots of knowledge are bitter, but its fruit are sweet.

The thirst of desire is never filled, nor fully satisfied.