Summary: 'St. Thomas Aquinas, a renowned theologian, earned the title "Angelic Doctor" for his intellect and meekness. Despite being called the "Dumb Ox" due to his silence and large size, he was a brilliant student. He authored influential works like the Summa Theologica, although it remained unfinished at his death in 1274. Canonized in 1323, he was declared a Doctor of the Church. He explained concepts like transubstantiation, the conversion of Eucharistic elements into the body of Christ during consecration'