What passage from The Once and Future King does Professor X read?

Question

In X-Men: Apocalypse, Professor X reads a passage from T.H. White's The Once and Future King to his students. Which passage did he read?

_{Answer preferably should contain the quote.}

Answer 1

Xavier quotes a few lines:

XAVIER: ... to break forth bloodily, then the past must be obliterated and a new start made. [...] XAVIER: Let us now start fresh without remembrance, rather than live forward and backward at the same time.

The original passage:

The blessing of forgetfulness: that was the first essential. If everything one did, or which one's fathers had done, was an endless sequence of Doings doomed to break forth bloodily, then the past must be obliterated and a new start made. Man must be ready to say: Yes, since Cain there has been injustice, but we can only set the misery right if we accept a status quo. Lands have been robbed, men slain, nations humiliated. Let us now start fresh without remembrance, rather than live forward and backward at the same time. We cannot build the future by avenging the past. Let us sit down as brothers, and accept the Peace of God.

—The Once and Future King

Answer 2

According to this article he quotes the line "Let us now start fresh without remembrance" which dealt with avoiding the desire for revenge. I haven't seen the film so I'm not sure if he quoted more of the lines before or after, but more of the original T.H. White quote can be read here. Google books shows the quote can be found on page 631 of this edition, which is 639 pages long, so apparently it's from very near the end.