Man: King of Mind, Body & Circumstance (Unabridged‪)‬

The problem of life is learning how to live. It's like the problem of addition or subtraction to the schoolboy. When mastered, all difficulty disappears, and the problem has vanished. All the problems of life - whether they are social, political, or religious - subsist in ignorance and wrongdoing. As they are solved in the heart of each individual, they will be solved in the mass of men.