He was called the Twin. On the way to Bethany He offered to die with Jesus.

He interrupted the last discourse of Jesus with the question "We know not whither thou goest; how know we the way?". Thomas doubted the resurrection of Christ unless he were to touch the wounds of the Risen Lord, but later confessed his faith in Him: "My Lord and My God" - the first to confess so explicitly the Lord's divinity. According to tradition, Thomas evangelized the Parthians. The Syrian Christians of Malabar called themselves "Christians of St. Thomas" and claimed they were evangelized by the Apostle Thomas, who was martyred and buried at Mylapore near Madras.