Sin and Gravity are alike in that they both weigh us down. Because of gravity, we are limited to moving around near the surface of the earth. The only way to rid of gravity is to be at some spot in space where all the gravitational forces attracting you from all directions cancel each other out. It's safe to say that we are entirely earthbound. As for sin, it becomes our spiritual burden, keeping us from soaring to God. But we don't need to be bound by it, for Christ can free us from sin instantly if we let him. So, in a way, I like sin more than gravity.