If I give a student one-fourth of what he should know, I expect him to get the other three-fourths himself, otherwise I do not want him as a student.

Isn't it a pleasure to study and practice what you have learned?

The one who was born a genius can't win against the one who tries, and the one who tries can't win against the one who enjoys.

Acquire new knowledge whilst thinking over the old, and you may become a teacher of others.

We should feel sorrow, but not sink under its oppression.

The failure to cultivate virtue, the failure to examine and analyze what I have learned, the inability to move toward righteousness after being shown the way, the inability to correct my faults-these are the causes of my grief.

Bird in hand makes it harder to blow nose.