Analysis of information sources in references of the Wikipedia article "John Piper" in Portuguese language version.
Following college he completed a Master of Divinity degree at Fuller Theological Seminary in Pasadena, California (1968–71).
Jesus chose Twelve Apostles for a unique, unrepeatable role in the history of redemption ... there seem to be also another group (or groups) of men called and authorized by Jesus in the New Testament, some of whom are on a par with the Twelve in their teaching authority. Paul certainly believed that his call and commission by the risen Christ put him on a par with the Twelve in his teaching role ....
God reveals something to the mind of the prophet (in some way beyond ordinary sense perception), and since God never makes a mistake, we know that his revelation is true. It has no error in it. But the gift of prophecy does not guarantee the infallible transmission of that revelation. The prophet may perceive the revelation imperfectly, he may understand it imperfectly, and he may deliver it imperfectly..
We need a third category for the 'spiritual gift of prophecy'—Spirit-prompted, Spirit-sustained, revelation-rooted, but mixed with human imperfection and fallibility and therefore in need of sifting..