|Dr. Zacharias Ursinus|
18 July 1534 - 6 May 1583
Answer: That I belong — body and soul, in life and in death — not to myself but to my faithful Savior, Jesus Christ, who at the cost of his own blood has fully paid for all my sins and has completely freed me from the dominion of the devil; that he protects me so well that without the will of my Father in heaven not a hair can fall from my head; indeed, that everything must fit his purpose for my salvation. Therefore, by his Holy Spirit, he also assures me of eternal life, and makes me wholeheartedly willing and ready from now on to live for him.
— Dr. Zacharias Ursinus
... best known as the principal author and interpreter of the Heidelberg Catechism which is a Protestant confessional document taking the form of a series of questions and answers, for use in teaching Reformed Christian doctrine.