What is our only hope in life and death? That we are not our own but belong, body and soul, both in life and death, to God and to our Savior Jesus Christ. So opens the first question and answer of a new catechism developed in large part by Tim Keller. If youâ€™re familiar with the Hiedelberg Catechism, this answer will sound familiar to you. In fact, this modern catechism called New City Catechism borrows most heavily from the Heidelberg, as well as from the Westminster Shorter, the Westminster Larger, and Calvinâ€™s Geneva Catechism.