Saint Irenaeus of Lyons

If one carefully reads the Scriptures, he will find there the word on the subject of Christ -- de Christo sermonem -- and the prefiguration of the new calling. He is indeed the hidden treasure in the field -- the field in fact is the world -- but in truth, the hidden treasure in the Scriptures is Christ. Because he is designed by types and words that humanly are not possible to understand before the accomplishment of all things, that is, Christ's parousia (coming).

-- Saint Irenaeus of Lyons