 James Montgomery Boyce, who was the pastor and preacher at 10th Presbyterian Church a generation ago. He explains this. He says, Christianity is not just a philosophy or a set of ethics. It is a philosophy. It explains the way the world works. It explains your place in the world. But it's more than that. It is a system of ethics. It explains how you should live, having received the gift of salvation, how you should live in response to God's grace. He says, but it's more than that.