The Divine Institutes

Therefore they were neglected for many ages; but they received attention after the nativity and passion of Christ had revealed secret things. Thus it was also with the utterances of the prophets, which were read by the people of the Jews for fifteen hundred years and more, but yet were not understood until after Christ had explained them both by His word and by His works. For the prophets spoke of Him; nor could the things which they said have been in any way understood, unless they had been altogether fulfilled.