| Geneva Study Bible Having the understanding darkened, being alienated from the {a} life of God through the ignorance that is in them, because of the blindness of their heart: (a) By which God lives in them. People's New Testament 4:18 Having the understanding darkened. He shows how the Gentiles walk in vanity. They are in darkness, unenlightened by the gospel. Alienated from the life of God. Without the spiritual life that comes from knowing God. Because of blindness of their heart. The idea is a willful blindness. Wesley's Notes 4:18 Having their understanding darkened, through the ignorance that is in them - So that they are totally void of the light of God, neither have they any knowledge of his will. Being alienated from the life of God - Utter strangers to the divine, the spiritual life. Through the hardness of their hearts - Callous and senseless. And where there is no sense, there can be no life. King James Translators' Notes blindness: or, hardness Jamieson-Fausset-Brown Bible Commentary 18. More literally, "Being darkened in their understanding," that is, their intelligence, or perceptions (compare Eph 5:8; Ac 26:18; 1Th 5:4, 5). alienated-This and "darkened," imply that before the fall they (in the person of their first father) had been partakers of life and light: and that they had revolted from the primitive revelation (compare Eph 2:12). life of God-that life whereby God lives in His own people: as He was the life and light in Adam before the irruption of death and darkness into human nature; and as He is the life in the regenerate (Ga 2:20). "Spiritual life in believers is kindled from the life itself of God" [Bengel]. through-rather as Greek, "on account of the ignorance," namely, of God. Wilful ignorance in the first instance, their fathers not "choosing to retain God in their knowledge." This is the beginning point of their misery (Ac 17:30; Ro 1:21, 23, 28; 1Pe 1:14). because of-"on account of." blindness-Greek, "hardness," literally, the hardening of the skin so as not to be sensible of touch. Hence a soul's callousness to feeling (Mr 3:5). Where there is spiritual "life" ("the life of God") there is feeling; where there is not, there is "hardness." Matthew Henry's Concise Commentary 4:17-24 The apostle charged the Ephesians in the name and by the authority of the Lord Jesus, that having professed the gospel, they should not be as the unconverted Gentiles, who walked in vain fancies and carnal affections. Do not men, on every side, walk in the vanity of their minds? Must not we then urge the distinction between real and nominal Christians? They were void of all saving knowledge; they sat in darkness, and loved it rather than light. They had a dislike and hatred to a life of holiness, which is not only the way of life God requires and approves, and by which we live to him, but which has some likeness to God himself in his purity, righteousness, truth, and goodness. The truth of Christ appears in its beauty and power, when it appears as in Jesus. The corrupt nature is called a man; like the human body, it is of divers parts, supporting and strengthening one another. Sinful desires are deceitful lusts; they promise men happiness, but render them more miserable; and bring them to destruction, if not subdued and mortified. These therefore must be put off, as an old garment, a filthy garment; they must be subdued and mortified. But it is not enough to shake off corrupt principles; we must have gracious ones. By the new man, is meant the new nature, the new creature, directed by a new principle, even regenerating grace, enabling a man to lead a new life of righteousness and holiness. This is created, or brought forth by God's almighty power. | 
