St. John Chrysostom:
For not only faith is necessary, but love. Since there are many still who believe that Christ is God, who yet love Him not, nor act like those who love Him. For how is it when they prefer everything to Him, money, nativity, fate, augury, divinations, omens? When we live in defiance of Him, pray, where is our love? Has any one a warm and affectionate friend? Let him love Christ but equally. ... What? How shall it appear that we do not love God even as our friends, you say? ... For consider: friends, that are truly friends, will often suffer loss for those they love. But for Christ, no one will suffer loss, or even be content with his present state. For a friend we can readily submit to insults, and undertake quarrels; but for Christ, no one can endure enmity: and the saying is, "Be loved for nothing--but be not hated for nothing."
None of us would fail to relieve a friend who was hungering, but when Christ comes to us from day to day, and asks no great matter, but only bread, we do not even regard him, yea though we are nauseously over full, and swollen with gluttony: though our breath betrays the wine of yesterday, and we live in luxury, and waste our substance on harlots and parasites and flatterers, and even on monsters, idiots, and dwarfs; for men convert the natural defects of such into matter for amusement. Again, friends, that are truly such, we do not envy, nor are mortified at their success, yet we feel this toward (the minister of)  Christ, and our friendship for men is seen to be more powerful than the fear of God, for the envious and the insincere plainly respect men more than God. And how is this? God sees the heart, yet man does not forbear to practice deceit in His sight; yet if the same man were detected in deceit by men, he thinks himself undone, and blushes for shame. And why speak of this? If a friend be in distress, we visit him, and should fear to be condemned, if we deferred it for a little time. But we do not visit Christ, though He die again and again in prison; nay, if we have friends among the faithful, we visit them, not because they are Christians, but because they are our friends. Thus we do nothing from the fear or the love of God, but some things from friendship, some from custom. When we see a friend depart on travel, we weep and are troubled, and if we see his death, we bewail him, though we know that we shall not be long separated, that he will be restored to us at the Resurrection. But though Christ departs from us, or rather we reject Him daily, we do not grieve, nor think it strange, to injure, to offend, to provoke Him by doing what is displeasing to Him; and the fearful thing is not that we do not treat Him as a friend; for I will show that we even treat Him as an enemy. How, do you ask? because "the carnal mind is enmity against God," as Paul has said, and this we always carry about us. And we persecute Christ, when He advances toward us, and comes to our very doors.**