When a man sees something desirable, he must reflect on the fact that with time it could come to involve what is detestable. When he sees something that is beneficial, he should reflect that sooner or later it, too, could come to involve harm.
Human nature is what Heaven supplies.
There are successful scholars, public-spirited scholars, upright scholars, cautious scholars, and those who are merely petty men.
The rigid cause themselves to be broken; the pliable cause themselves to be bound.
If the gentleman has ability, he is magnanimous, generous, tolerant, and straightforward, through which he opens the way to instruct others.
Human nature is evil, and goodness is caused by intentional activity.
