Is Self Sacrifice a Metaphysical Principle?

Self sacrifice is an instant tation of that. It's the activity of the human life. I mean, i's a lot of controversy whether this is a fundamental metaphysical principle, or psychological principle,. Obviously we can't discuss that. But to me, it seems like, at the very least, it's a fundamental psychological principle andr some sort of metaphysical principle. Yet you can still say he's doing something that is exerting his own will to power. Heis being selfish in that sense. The action does not look selfish to us, because we are thinking, of course, the self is just you; according to the logic of the psychic act, it is not as something larger