More genius of Nietzsche: "Since one would be used up too quickly if one reacted, one no longer reacts at all: this is the principle. And nothing consumes a man more quickly than the emotion of resentment. [...] Resentment born of weakness is harmful to no one more than to the weak man himself--conversely, with a fundamentally rich nature, resentment is a superfluous feeling, which, if one remains master of it, is almost a proof of riches. Those readers who know the earnestness with which my philosophy wages war against the feelings of revenge and rancor, even to the extent of attacking the doctrine of 'free will' (my conflict with Christianity is only a particular instance of it), will understand why I wish to emphasize my own personal attitude and the certainty of my practical instincts precisely in this matter. In my decadent period, I forbade myself these feelings, because they were harmful; but as soon as my life had recovered enough riches and pride, I still forbade myself them, but now because they were beneath me."