The whole idea is that you cannot do it by your own effort. And the moment you think you can do it by your own effort, you’re a phony. You have instead to go completely with the other: to disown your own power and capability of being virtuous, unselfish, et cetera.
Don’t you see that “self” and “other” go together? That you don’t need to cling to yourself, because you have everything you called other—and that’s you, too. But you only realize this if you explore it, if you go to an extreme.
To do nothing—really do nothing—with perfection is as difficult as to do everything.