Napoleon said, "I may lose a battle, but I will never lose a minute." In the Old West, it was said "Do unto others as they would do unto you, but do it first." We cannot attack because we think someone might attack us, but when we know an aggressor intends to attack, then we must attack first, fast, and effectively. The stake in self-defense is your life. The perfect fight is one that is over before the loser realizes what is happening, so if attacked, retaliate immediately. Be fast, not fair.
"The best defense if a good offense." The best defense is an explosive counter attack. In a defensive environment, you cannot initiate violence; the attacker must strike, or attempt to strike, the first blow. The law says you should run from a fight, but, if that is not feasible—you must survive. Aggressiveness carries with it an incalculable mental edge. It is possible for a highly proficient and viciously aggressive person to overcome numerous attackers.
Cultivate an aggressive response to evil. Build indignation by watching the news. Believe that there are bad people in the world who do not deserve your sympathy and who have no right to harm you. Get angry at evil acts. If attacked, your emotion should be anger, not fear. Be indignant! Be angry! Be aggressive!