Saint Thomas Aquinas (1225-1274) was an Italian Dominican friar and Catholic priest. He was an immensely influential philosopher, theologian, and jurist in the tradition of scholasticism. In Chesterton's portrayal Saint Thomas is mysterious man who was born in rich family, but despite that, decided to live a humble life of a friar. Because Thomas was quiet and didn't speak much, some of his fellow students thought he was slow and called him the dumb ox, but he was a man of rare brilliance who started a revolution in Christian thought. He was given a title Doctor of the Church by the Catholic Church for having made significant contribution to theology and doctrine through his work.