Psalm 119:1

ALEPH. Blessed [are] the undefiled in the way
Who are in the right way to heaven and happiness, which is Jesus Christ; the strait gate, and narrow way to eternal life; the only true way of life and salvation, in which way believers walk by faith. All out of this way are altogether become filthy; but all in this way are clean, even every bit: they are without spot and blemish, blameless and unreproveable, and without fault, before the throne of God and in his sight; being washed from their sins in the blood of the Lamb, and clothed with his righteousness; and even "perfect" and complete in him, as the Targum renders the word. These are also found in the way of their duty, and walk in all the commandments and ordinances of the Lord, blameless before men, and are sincere and upright in the sight of God; and are upon all accounts happy persons:

who walk in the law of the Lord:
within the boundaries and limits of it, according to its direction, as it is a rule of walk and conversation in the hands of Christ the Lawgiver; and who continue to walk in it, as in a pleasant path, with great delight; and cheerfully obey its precepts, as influenced by the love of God, and assisted by the Spirit and grace of Christ. The word "law", or "doctrine", as it signifies, may design every revelation of the divine will; and even the doctrine of Christ, which believers should abide in, and not transgress; and should walk uprightly according to the truth of it, and as becomes it, and as they are enabled to do.