Faith
Faith is certain that God is true in all things whether he command or forbid, whether he promise or threaten; and it also obediently receives his commandments, observes his prohibitions, heeds his threats. Nevertheless, faith properly begins with the promise, rests in it, and ends in it.
John Calvin, Institutes of the Christian Religion & 2 (3.2.29), ed. John T. McNeill, trans. Ford Lewis Battles, vol. 1, The Library of Christian Classics (Louisville, KY: Westminster John Knox Press, 2011), 575