I hope he teaches it more and more and more and more. Only a person who has not only studied the entire Bible can understand this, but a person who has been given the eyes, ears, and heart to see, hear, and comprehend what the Lord intends for HIS Elect to understand. Those who are not given these Spiritual gifts are apparently forbidden to understand. There is Scripture that demonstrates this principle . . . that is extant to this day.
Isaiah 29:11-13 NLT - 11 "All the future events in this vision are like a sealed book to them. When you give it to those who can read, they will say, "We can't read it because it is sealed." 12 When you give it to those who cannot read, they will say, "We don't know how to read." 13 And so the Lord says, "These people say they are mine. They honor me with their lips, but their hearts are far from me. And their worship of me is nothing but man-made rules learned by rote."
2 Corinthians 3:12-16 NLT - 12 "Since this new way gives us such confidence, we can be very bold. 13 We are not like Moses, who put a veil over his face so the people of Israel would not see the glory, even though it was destined to fade away. 14 But the people's minds were hardened, and to this day whenever the old covenant is being read, the same veil covers their minds so they cannot understand the truth. And this veil can be removed only by believing in Christ. 15 Yes, even today when they read Moses' writings, their hearts are covered with that veil, and they do not understand. 16 But whenever someone turns to the Lord, the veil is taken away."