A man must gain command over his rage, anger, ruthlessness, kindness, love, patience and his tongue.
The right use of these at the right times can make him the best man alive.
Any man who fails in life is because he lost control of one or more of these. Most importantly, a man must figure out how to identify good women.
Choosing a wife is the most important decision of a man's life.
He can't get this wrong or everything else is spoiled by this.