At the present time we cannot know how great God's love for us is: this is because the good things that God will give us exceed our longings and desires, and so cannot be found in our heart: "What no eye has seen, nor ear heard, nor the heart of man conceived, that God has prepared for those who love him" (1 Cor 2:9).
[Thomas Aquinas, Commentary on the Gospel of John, Chapters 13-21, Larcher & Weisheipl, trs. The Catholic University of America Press (Washington, DC: 2010) p. 191.]
