The purpose of Sabbath is not simply to rejuvenate yourself in order to do more production, nor is it the pursuit of pleasure. The purpose of Sabbath is to enjoy your God, life in general, what you have accomplished in the world through his help, and the freedom you have in the gospel-the freedom from slavery to any material object or human expectation. The Sabbath is a sign of the hope that we have in the world to come.
Timothy KellerIf a person has grasped the meaning of God's grace in his heart, he will do justice. If he doesn't live justly, then he may say with his lips that he is grateful for God's grace, but in his heart he is far from him. If he doesn't care about the poor, it reveals that at best he doesn't understand the grace he has experienced, and at worst he has not really encountered the saving mercy of God. Grace should make you just.
Timothy KellerMost apologetic books are really written for Christians, even the ones that purport to be written for non-believers.
Timothy Keller