Our Lord was able to change bread and wine into His body and blood by His almighty power.
If God made the universe out of nothing, He certainly could change bread and wine into His Body and Blood. Christ Himself changed water into wine at the marriage feast of Cana, by a mere act of His Divine Will. Every day we can see the results of God’s power in the miracle of growth: people grow, the trees grow; inanimate or dead matter is assimilated as food and continues as living beings or vegetation,–all by the power of God.