Hilary of Poitiers

It is indeed certain, that he who as forerunner proclaimed Christ’s coming, as prophet knew Him when He stood before him, and worshipped Him as Confessor when He came to him, could not fall into error from such abundant knowledge. Nor can it be believed that the grace of the Holy Spirit failed him when thrown into prison, seeing He should hereafter minister the light of His power to the Apostles when they were in prison.