3 But the straight course of heavenly destiny,
straight > straight; or: strait: strict, narrow, confining
4 Led with eternal providence, that has 5 Guided your glance, to bring His will to pass: 6 Nor is your fate, nor is your fortune ill,
ill > bad, evil
7 To love the prowest knight that ever was.
prowest > bravest
8 Therefore submit your ways to His will,
His > (Or: his, meaning Artegall's)
9 And do by all due means your destiny fulfil."
303.25