I once tried thinking for an entire day, but I found it less valuable than one moment of study.

Human nature refers to what is in people but which they cannot study or work at achieving.

The person attempting to travel two roads at once will get nowhere.

If the quickness of the mind and the fluency of the tongue are too punctilious and sharp, moderate them in your activity and rest.

Human nature is evil, and goodness is caused by intentional activity.

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.