A high moral character requires that we set the same standards for ourselves as we do for others.
Man is born in contradictions. First of all you have to learn the art of contradiction management.

Those who learn virtues and teach it to others are the best among humankind. -- Prophet Muhammad
One sign of a principled person is his strictness with himself, and his tolerance towards others

One who does not listen to others’ difference of opinion is not to be counted as a learned man.
A person of good character will invariably conform in his behaviour to a strict code of ethics.

A man of character is a man of principle and integrity. In short, he is a trustworthy person.
A person should not act in a manner that belittles himself in the eyes of his own conscience.

If one refrains from provocation, one will automatically save oneself from retaliation.