Calvin on man being God's workmanship

For how can the idea of God enter your mind without instantly giving rise to the thought, that since you are his workmanship, you are bound, by the very law of creation, to submit to his authority?—that your life is due to him?—that whatever you do ought to have reference to him: If so, it undoubtedly follows that your life is sadly corrupted, if it is not framed in obedience to him, since his will ought to be the law of our lives.

(Institutes p. 41 Book 1. Chapter II, Section 3)