Acts 15:9
9. put no difference between us and them: purifying their hearts by faith—"Purification" here refers to "sprinkling (of the conscience by the blood of Jesus) from dead works to serve the living God." (See on 1Co 6:11). How rich is this brief description of the inward revolution wrought upon the genuine disciples of the Lord Jesus!
2 Timothy 2:22
22. Flee—There are many lusts from which our greatest safety is in flight (Ge 39:12). Avoid occasions of sin. From the abstemious character of Timothy (1Ti 5:23) it is likely that not animal indulgences, but the impetuosity, rash self-confidence, hastiness, strife, and vainglory of young men (1Jo 2:14-16), are what he is here warned against: though the Spirit probably intended the warning to include both in its application to the Church in general.
also—Greek, "But"; in contrast to "every good work," 2Ti 2:21. youthful—Timothy was a youth (1Ti 4:12). righteousness—the opposite of "iniquity," that is, unrighteousness (2Ti 2:19; compare 1Ti 6:11). peace, with, &c.—rather, put no comma, "peace with them that call on the Lord out of a pure heart" (1Ti 1:5; Eph 6:5; Col 3:22). We are to love all men, but it is not possible to be at peace with all men, for this needs community of purpose and opinion; they alone who call on the Lord sincerely (as contrasted with the false teachers who had only the form of godliness, 2Ti 3:5, 8; Tit 1:15, 16) have this community [THEODORET]. (Ro 12:18).Titus 1:15
15. all things—external, "are pure" in themselves; the distinction of pure and impure is not in the things, but in the disposition of him who uses them; in opposition to "the commandments of men" (Tit 1:14), which forbade certain things as if impure intrinsically. "To the pure" inwardly, that is, those purified in heart by faith (Ac 15:9; Ro 14:20; 1Ti 4:3), all outward things are pure; all are open to, their use. Sin alone touches and defiles the soul (Mt 23:26; Lu 11:41).
nothing pure—either within or without (Ro 14:23). mind—their mental sense and intelligence. conscience—their moral consciousness of the conformity or discrepancy between their motives and acts on the one hand, and God's law on the other. A conscience and a mind defiled are represented as the source of the errors opposed in the Pastoral Epistles (1Ti 1:19; 3:9; 6:5).