The young are heated by Nature as drunken men by wine.
All men by nature desire knowledge.
It is well to be up before daybreak, for such habits contribute to health, wealth, and wisdom.
Every virtue is a mean between two extremes, each of which is a vice.
A true disciple shows his appreciation by reaching further than his teacher.
Neither by nature, then, nor contrary to nature do the virtues arise in us; rather we are adapted by nature to receive them, and are made perfect by habit.