n Chabad-Lubavitch it is our approach to invite a Jew -- even one who claims not to believe -- to do a mitzvah, before we engage them in a discussion on faith. Because in consideration of the existence of the soul, we can assume that we don't have to convince people of life's Divine purpose. We just have to get them started, and with each mitzvah they do, their neshama asserts itself more, and questions become answered of themselves. By way of analogy, if a woman's maternal instinct appears to be absent, you don't argue the philosophy of motherhood with her. Just put the baby in her lap and her maternal response will emerge.