Isaiah chiefly foretells the mystery of the Incarnation, which is why he is read during the time of Advent by the Church, and Jeremiah the mystery of the Passion, hence he is read in Passiontide, and Ezekiel the mystery of the Resurrection, hence his book finishes with the raising of the bones and the repair of the temple. Daniel, however, is included among the prophets insofar as he predicted future events in a prophetic spirit; although he did not speak to the people in the person of the Lord, he dealt with the divinity of Christ. Thus the four prophets answer to the four Evangelists, and also to the call to judgement.
--St. Thomas Aquinas, The Inaugural Sermons in Thomas Aquinas, Selected Writings, Penguin.
