When Nietzsche praises egoism it is always in an aggressive or polemical way, against the virtues, against the virtue of disinterestedness (Z III "Of the three evil things"). But in fact egoism is a bad interpretation of the will, just as atomism is a bad interpretation of force. In order for there to be egoism it is necessary for there to be an ego.
Gilles DeleuzeA concept is a brick. It can be used to build a courthouse of reason. Or it can be thrown through the window.
Gilles DeleuzeCourage consists, however, in agreeing to flee rather than live tranquilly and hypocritically in false refuges. Values, morals, homelands, religions, and these private certitudes that our vanity and our complacency bestow generously on us, have many deceptive sojourns as the world arranges for those who think they are standing straight and at ease, among stable things
Gilles Deleuze