Thus, even having learned from Jesus personally and having had their understanding "opened" by the risen Christ, the apostles and their followers in Jerusalem remained "zealous for the Law" and admonished Paul about teaching any Jews to do otherwise.
44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me. 45 Then opened he their understanding, that they might understand the scriptures, 46 And said unto them, Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead the third day: 47 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
What Jesus revealed to them was all of the things concerning him in the Old Testament.
For example, I have yet to find one person who believed in Inerrency that could explain the contradiction of the date of Jesus's birth between Matthew and Luke. They mention historical events that make their accounts mutually exclusive.