30 But let us take what is yet a greater wonder than this. For that of bodies bodies should be conceived, even if wonderful, is nevertheless possible: but that the dust of the earth should become a man, this is more wonderful. That clay moulded together should assume the coats and splendours of the eyes, this is more wonderful. That out of dust of uniform appearance should be produced both the firmness of bones, and the softness of lungs, and other different kinds of members, this is wonderful. That clay should be animated and travel round the world self moved, and should build houses, this is wonderful. That clay should teach, and talk, and act as carpenter, and as king, this is wonderful. Whence, then, O you most ignorant Jews, was Adam made? Did not God take dust from the earth, and fashion this wonderful frame? Is then clay changed into an eye, and cannot a virgin bear a son. Does that which for men is more impossible take place, and is that which is possible never to occur?
Source: Catechetical Lectures (New Advent)