3 Cannot endure, but needs it must be wracked
needs > of necessity, perforce wracked > wrecked, shipwrecked; ruined
4 On the rough rocks, or on the sandy shallows, 5 While Love it steers, and Fortune rows;
Love > [Cupid; on his blindness, see 304.6:8]
6 Love, my lewd pilot, has a restless mind,
lewd > unlearned; bungling; worthless; sorry, poor; lewd, lascivious
7 And Fortune, boatswain, no assurance knows,
assurance > steadiness, intrepidity
8 But sail without stars, gainst tide and wind:
stars > [benefit of navigation by the stars] gainst > against