He keepeth
natsar (naw-tsar')
to guard, in a good sense (to protect, maintain, obey, etc.) or a bad one (to conceal, etc.)
the paths
'orach (o'-rakh)
a well-trodden road; also a caravan -- manner, path, race, rank, traveller, troop, (by-, high-)way.
of judgment
mishpat (mish-pawt')
a verdict (favorable or unfavorable) pronounced judicially, especially a sentence or formal decree (human or (participant's) divine law, individual or collective
and preserveth
shamar (shaw-mar')
to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.
the way
derek (deh'-rek)
a road (as trodden); figuratively, a course of life or mode of action, often adverb
of his saints
chaciyd (khaw-seed')
kind, i.e. (religiously) pious (a saint) -- godly (man), good, holy (one), merciful, saint, (un-)godly.