Origen Against Celsus V7

But if he were dealing honestly in his accusations, he ought to have given the exact terms of the prophecies, whether those in which the speaker is introduced as claiming to be God Almighty, or those in which the Son of God speaks, or finally those under the name of the Holy Spirit. For thus he might have endeavoured to overthrow these assertions, and have shown that there was no divine inspiration in those words which urged men to forsake their sins, which condemned the past and foretold the future.