Human nature is completely egoistic. That is why a person cannot transform it on his own and needs an outside power to change him. This power can be evoked only by studying the wisdom of Kabbalah in the group.
“Indeed, I admit that this is a very difficult thing. One cannot change the nature of one’s own creation, which is only to receive for oneself, much less invert one’s nature from one extreme to the other, meaning to not receive anything for oneself, but rather act only to bestow.
Yet, this is why the Creator gave us Torah [the wisdom of Kabbalah] and Mitzvot [actions in the group], which we were commanded to do only in order to bestow contentment upon the Creator.” (Baal HaSulam, “A Speech for the Completion of The Book of Zohar”)
Instructions On Canning Egoism