eath > easy amiss > evil; [an] evil deed (cf. Hamlet IV v 18)

6 But who his limbs with labours, and his mind

who > [he who]

7 Behaves with cares, cannot so easy miss.

Behaves > Conducts, regulates cares > concern; thought, study miss > go wrong

8 Abroad in arms, at home in studious kind,

arms > deeds of arms kind > station in life, place; manner, way

9 Who seeks with painful toil, shall Honour soonest find.

Who > [He who]

203.41