gan > did fair > courteously
4 To have her knight into her schoolhouse placed, 5 That of her heavenly learning he might taste,
That > [So that]
6 And hear the wisdom of her words divine. 7 She granted, and that knight so much aggraced
aggraced > favoured
8 That she him taught celestial discipline,
celestial > heavenly discipline > {Learning; mental and moral training}
9 And opened his dull eyes, that light might in them shine.
that > [so that]
110.19