6 As feats of arms, and love to entertain,

As > [Such as] entertain > deal with; occupy oneself with; receive, be receptive to; cherish

7 But chiefly skill to ride, seems a science

science > skill, lore

8 Proper to gentle blood; some others feign

Proper > Belonging, peculiar; proper gentle > noble feign > [pretend to be able]

9 To manage steeds, as did this vaunter; but in vain.

vaunter > boaster [Braggadocchio]

204.2

But he the rightfull owner of that steed,
2 Who well could menage and subdew his pride,
The whiles on foot was forced for to yeed,
4 With that blacke Palmer, his most trusty guide;
Who suffred not his wandring feet to slide.
6 But when strong passion, or weake fleshlinesse
Would from the right way seeke to draw him wide,
8 He would through temperance and stedfastnesse,
Teach him the weake to strengthen, and the strong suppresse.