Augustine of Hippo

Faith, hope and charity, those three virtues for whose building up is mounted all the scaffolding of the Bible, are only in the soul that believes what it does not yet see, and hopes and loves what it believes. Therefore there can be love even of One who is not known, if yet he is believed. Doubtless, we must beware lest the soul, believing what it does not see, fabricates for itself an image of that which is not and bases its hope and love upon a lie. Then there will not emerge that "charity from a pure heart and a good conscience and a faith unfeigned, which is the end of the commandment."