experience
A quote by Henry James.
Deep experience is never peaceful
Related
Most people would succeed in small things if they were not troubled with great ambitions
Peace is not only better than war, but infinitely more arduous
Those who are at war with others are not at peace with themselves
One forgives to the degree that one loves
The harder the conflict, the more glorious the triumph
Anger, if not restrained, is frequently more hurtful to us than the injury that provokes it.