Speaketh the truth in his heart--i.e., both thinks and speaks the truth.
"This above all: to thine own self be true,
And it must follow as the night the day,
Thou canst not then be false to any man."
and worketh righteousness; not in order to his justification before God; for not such an one, but he that trusts in the Lord for righteousness, shall inherit his holy mountain, Isaiah 57:12; but he that works the work of faith, and believes in the righteousness of Christ; who looks to it and receives it; that lays hold on it and pleads it as his justifying righteousness; he that does righteousness in this sense, is righteous as Christ is righteous, 1 John 3:7; and such an one is a proper person to dwell in his house; and who also by faith does works of righteousness, and whose life is a series and course of righteousness, as a fruit of his faith, and in consequence of his having laid hold on the righteousness of Christ;
and speaketh the truth in his heart; receives Christ who is the truth, and the Gospel the word of truth into his heart, and makes an hearty profession of the same before men; and both speaks according to his light in the Scriptures of truth, whenever he speaks of divine things; and in common conversation speaks truth from his heart to his neighbour, and does not speak with a double heart, or say one thing with his mouth, and intend another in his heart; see Psalm 12:2; or endeavour to deceive persons, and impose a falsehood on them, or tell them lies; for as such a person is not fit to dwell in a private house, or to be in a civil society, much less is he a proper person to be in the house of God.
(e) "perfectus", Montanus, Gejerus,