Gregory the Great — Dialogues 2.17 (greater miracle)
If we attend to visible things, we must believe so; but if we weigh invisible things, it is clear that it is a greater miracle to convert a sinner by the word of preaching and the comfort of prayer than to raise a dead body in the flesh. For in the one case flesh is raised that will die again; in the other a soul that will live forever. … The Lord raised Lazarus in the flesh; but he raised Saul in the mind.
Latin
Si visibilia attendimus, ita necesse est ut credamus; si vero invisibilia pensamus, nimirum constat, quia majus est miraculum praedicationis verbo atque orationis solatio peccatorem convertere, quam carne mortuum resuscitare. In isto enim resuscitatur caro iterum moritura, in illo vero anima in aeternum victura. … Lazarum quippe … carne Dominus suscitavit; Saulum vero resuscitavit in mente.