1 And with them eke, O goddess heavenly bright,
eke > also, in addition bright > bright; beautiful
2 Mirror of grace and majesty divine,
Mirror > Reflection; reflector; exemplar (he is now addressing Queen Elizabeth; the moment of uncertainty smoothly conflates her with both Venus and the "holy Virgin" of 100.2:1)
3 Great lady of the greatest isle, whose light
greatest isle > [Britain]
4 Like Phoebus' lamp throughout the world does shine,
Phoebus > (Phoebus Apollo, god of the sun; Elizabeth's light is elsewhere (e.g. 300.4:8) compared to that of the moon and (209.4:6) to that of the morning star)
5 Shed your fair beams into my feeble eyes, 6 And raise my thoughts, too humble and too vile,
vile > lowly, wretched