The idea of God is a picture painted with negative space. He is the man that is missing, the things we wish for that do not exist. We hunger for justice, love, and purpose, so these are the qualities we give to God. But there is no god and these ideals are not intrinsic qualities of the universe. So if we want them, we must fight for them. We must build them ourselves.
Religion crystalizes these ideals in the personage of God and keeps them in the forefront of our mind. It provides a pedal tone, a fixed point that permeates the symphony of our lives. It reminds us of what we ought to be striving for.
Our hearts burn for justice. They cry out for love. They bleed for purpose. So when you are confronted with the Christian gospel, what else is there to do but to think "of course"? Of course, this is the religion that humans would create. This is the shape of the hole in our hearts.
We should all be more godly. Even atheists like me.