'God saw Abraham's sacrifice and said, "Now I know you love me, because you did not withold your only son from me." But how much more can we look at his sacrifice on the Cross, and say to God, "Now we know that you love us. For you did not withold your son, your only son, whom you love, from us."'
Timothy Keller, Counterfeit Gods: When the emopty promises of love, money and power let you down, p.18.