Matthew and Luke recount the three temptations of Jesus that reflect the inner struggle over his own particular mission and, at the same time, address the question as to what truly matters in human life. At the heart of all temptations, as we see here, is the act of pushing God aside because we perceive him as secondary, if not actually superfluous and annoying, in comparison with all the apparently far more urgent matters that fill our lives. Constructing a world by our own lights, without reference to God, building on our own foundation; refusing to acknowledge the reality of anything beyond the political and the material, while setting God aside as an illusion—that is the temptation that threatens us in many varied forms.
Moral posturing is part and parcel of that temptation. It does not invite us directly to do evil—no, that would be far too blatant. It pretends to show us a better way, where we finally abandon our illusions and throw ourselves in the work of actually making the world a better place. It claims, moreover, to speak for true realism: what’s real is what’s right there in front of us—power and bread. By comparison, the things of God fade into unreality, into a secondary world that no one needs.
God is the issue: Is he real, reality itself, or isn’t he? Is he good, or do we have to invent good ourselves? The God question is the fundamental question, and it sets us down right at the crossroads of human existence.
--Pope Benedict XVI, Jesus of Nazareth.