There is one word which may serve as a rule of practice for all one's life -reciprocity.

Do not impose on others what you yourself do not desire.

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.

When you have faults, do not fear to abandon them.

Among us, in our part of the country, those who are upright are different from this. The father conceals the misconduct of the son, and the son conceals the misconduct of the father. Uprightness is to be found in this.

The people may be made to follow a path of action but they may not be made to understand it.

The person who is not strong enough gives up at the halfway point - but you are limiting yourself before even starting.