Thanks to Dan for this article on Bono around Salty Dogma:

Bono puts it really well: "At the center of all religions is the idea of Karma. You know, what you put out comes back to you: an eye for an eye, a tooth for a tooth, or in physics—in physical laws—every action is met by an equal or an opposite one," explains Bono. "And yet, along comes this idea called Grace to upend all that. . . . Love interrupts, if you like, the consequences of your actions, which in my case is very good news indeed, because I've done a lot of stupid stuff."