[Pattern in himself to know,
Grace to stand, and virtue go]

These lines I cannot understand, but believe that they should be read thus:

Patterning himself to know,
In grace to stand, in virtue go;

To pattern is to work after a pattern, and, perhaps, in Shakespeare's licentious diction, simply to work. The sense is, he that bears the sword of heaven should be holy as well as severe; one that after good examples labours to know himself, to live with innocence, and to act with virtue.

III.ii.294 (91,5)

[So disguise shall, by the disguis'd
Pay with falshood false exacting]

So disguise shall by means of a person disguised, return an injurious demand with a counterfeit person.

IY.i.13 (93,4) [My mirth it much displeas'd, but pleas'd my woe] Though the musick soothed my sorrows, it had no tendency to produce light merriment.

IV.i.21 (93,5) [constantly] Certainly; without fluctuation of mind.

IV.i.28 (93,6) [circummur'd with brick] Circummured, walled round. He caused the doors to be mured and cased up.