Courage is the complement of fear. A man who is fearless cannot be courageous.(He is also a fool.)
No storyteller has ever been able to dream up anything as fantastically unlikely as what really does happen in this mad Universe.
If it can't be expressed in figures, it's not science it's opinion.
A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.