Sin has made us God-haters at the core of our souls so that we are all by nature at enmity with God. In order for us to do what God would have us to do, we need to be who God wants us to be. And in order for us to be who God wants us to be, we need new natures. And because we cannot change our own nature, no more than we can push a bus while we are riding in it, we are in need of the sovereign hand of grace to change it for us. We cannot do what pleases God because we will not do what pleases God. And the reason we will not is because we don’t want to.