{He that looketh into} (ho parakupsas). First aorist
active articular participle of parakupt(935c), old verb, to stoop
and look into ( Joh 20:5,11 ), to gaze carefully by the side of,
to peer into or to peep into ( 1Pe 1:12 ). Here the notion of
beside (para) or of stooping (kupt(935c)) is not strong.
Sometimes, as Hort shows, the word means only a cursory glance,
but the contrast with verse  24  seems to preclude that here.
{The perfect law} (
omon teleion). For 	eleion see  1:17 .
See  Ro 7:12  for Paul's idea of the law of God. James here
refers to the word of truth ( 1:18 ), the gospel of grace ( Ga
6:2  Ro 12:2 ). {The law of liberty} (	on t(8873) eleutherias).
"That of liberty," explaining why it is "perfect" ( 2:12  also),
rests on the work of Christ, whose truth sets us free ( Joh 8:32  2Co 3:16  Ro 8:2 ). {And so continueth} (kai parameinas). First
aorist active articular participle again of paramen(935c), parallel
with parakupsas. Paramen(935c) is to stay beside, and see  Php
1:25  for contrast with the simplex men(935c). {Being}
(genomenos). Rather, "having become" (second aorist middle
participle of ginomai to become). {Not a hearer that
forgetteth} (ouk akroat(8873) epil(8873)mon(8873)). "Not a hearer of
forgetfulness" (descriptive genitive, marked by forgetfulness).
Epil(8873)mon(885c) is a late and rare word (from epil(8873)m(936e),
forgetful, from epilanthomai, to forget, as in verse  24 ),
here only in N.T. {But a doer that worketh} (alla poi(8874)(8873)
ergou). "But a doer of work," a doer marked by work (descriptive
genitive ergou), not by mere listening or mere talk. {In his
doing} (en t(8869) poi(8873)ei autou). Another beatitude with
makarios as in  1:12 , like the Beatitudes in  Mt 5:3-12 .
Poi(8873)is is an old word (from poie(935c) for the act of doing),
only here in N.T.