You are are strong, but there is a flaw in your strength, and unless you learn to control it the flaw will prove stronger than your strength and defeat you. The flaw? Explosive emotional reaction out of all proportion to the occasion. Why? Why this unreasonable anger at the sight of others who are happy or content, this growing contempt for people and the desire to hurt them?
All right, you think they’re fools, you despise them because their morals, their happiness is the source of your frustration and resentment. But these are dreadful enemies you carry within yourself – in time destructive as bullets. Mercifully, a bullet kills its victim. The other bacteria, permitted to age, does not kill a man but leaves in its wake the hulk of a creature torn and twisted: there is still fire within his being kept alive by casting upon it maggots of scorn and hate.
He may successfully accumulate, but he does not accumulate success, for he is his own enemy and is kept from enjoying his achievements.
In Cold Blood – Truman Capote