Why was Adolf ****** so powerful? Why was Martin Luther King Jr. Powerful? Why is the Devil powerful? Because they have the three most powerful weapons known to man. ****** used Fear. The mind was in panic, and didn't know where the monster was, or what it was. Martin Luther King Jr. used hope. The example of a better tomorrow. A chance to destroy the very evil walking among the earth. The Devil uses Temptation. To make you think one drink, one pill, one shot, one try, is only harmless; But in the end, he killed you, without even laying a finger on you. To have the most powerful weapons doesn't require physical objects. It requires the mind's powerful side of the brain. Fear, hope, and temptation.