Surely it is the maxim of loving-kindness: Do not unto others that you would not have them do unto you.

Not feeling compassion for a stranger is like not feeling when one's foot has caught fire

Virtuous people often revenge themselves for the constraints to which they submit by the boredom which they inspire.

To study and not think is a waste. To think and not study is dangerous.

Table your mistakes, learn from them, then move on.

When we have intelligence resulting from sincerity, this condition is to be ascribed to nature; when we have sincerity resulting from intelligence, this condition is to be ascribed to instruction. But given the sincerity, and there shall be the intelligence; given the intelligence, and there shall be the sincerity.

There are some with whom we may study in common, but we shall find them unable to go along with us to principles. Perhaps we may go on with them to principles, but we shall find them unable to get established in those along with us. Or if we may get so established along with them, we shall find them unable to weigh occurring events along with us.