might > could
5 And that bright tower, all built of crystal clean,
bright > bright; beautiful clean > {Clear, transparent; free from moral or spiritual pollution; pure and uncluttered in style}
6 Panthea, seemed the brightest thing that was:
Panthea > "All Sights", "Totality of Visions" (Greek, meaning
"Nonesuch", "Nonpareil", etc. Possibly identifiable as
Westminster Abbey or the Queen's Palace of Richmond)
7 But now by proof all otherwise I ween;
ween > think
8 For this great city that does far surpass, 9 And this bright angels' tower quite dims that tower of glass."
110.59
Most trew, then said the holy aged man;
2 Yet is Cleopolis for earthly +frame+,
The fairest peece, that eye beholden can:
4 And well beseemes all knights of noble name,
That couet in th'immortall booke of fame
6 To be eternized, that same to haunt,
And doen their seruice to that soueraigne Dame,
8 That glorie does to them for guerdon graunt:
For she is heauenly borne, and heauen may iustly vaunt.