No one should form an acquaintance with one who has an evil character. A piece of coal, if it is hot burns, and if it's cold, blackens the hands.

Youth, abundant wealth, high birth, and inexperience, are, each of them a source of ruin. What then must be the fate of those in whom all four are combined.

What ever is the natural propensity of a person is hard to overcome. If a dog were made a king, he would still gnaw at his shoes laces.

Learning is a livelihood.

That one is learned who has reduced his learning to practice.

Idleness, women, disorder, a foolish partiality for one's own native place, discontent and timidity are six obstructions to greatness.