“DOES any unbeliever profess that the changing of bread and wine into the Body and Blood of the Lord is impossible? Then let him consider God’s omnipotence. Admit that nature can transform one thing into another, then with greater reason should you admit that God’s almighty power, which brings into existence the whole substance of things, can work, not as nature does, by changing forms in the same matter, but by changing one whole thing into another whole thing.”
~St. Thomas Aquinas: Concerning Reasons of the Faith, 8.
There is a Latin/English version of this short work De rationibus fidei, addressed to the Cantor of Antioch, which can be read online here.
