The fruit/proofs of authentic/true Christianity: Love for God (Psm. 42:1ff; 73:25; Lk. 10:27; Rom. 8:7), repentance from sin (Psm. 32:5; Prov. 28:13; Rom. 7:14ff; 2 Cor. 7:10; 1 John 1: 8-10), genuine humility (Psm. 51:17; Mt. 5:1-12; Jas. 4:6,9ff), devotion to God’s glory (Psm. 105:3; 115:1; Isa. 43:7, 48:10ff.; Jer. 9:23,24; 1 Cor. 10:31), continual prayer (Lk. 18:1; Eph. 6:18ff.; Phil. 4:6ff.; 1 Tim. 2:1-4; Jas. 5:16-18), selfless love (1 Jn. 2:9ff, 3:14; 4:7ff.), separation from the world (1 Cor. 2:12; Jas. 4:4ff.; 1 Jn. 2:15-17, 5:5), spiritual growth (Luke 8:15; John 15:1-6; Eph. 4:12-16), obedient living (Mt. 7:21; Jn. 15:14ff.; Rom. 16:26; I Pet. 1:2, 22; 1 Jn. 2:3-5).
John MacArthur