Simply put, to justify is to declare righteous. Justification is an act of God whereby He pronounces a sinner to be righteous because of that sinner’s faith in Christ. According to one theologian, “the root idea in justification is the declaration of God, the righteous judge, that the man who believes in Christ, sinful though he may be, is righteous—is viewed as being righteous, because in Christ he has come into a righteous relationship with God” (Ladd, G. E., A Theology of the New Testament, Eerdmans, 1974, p. 437).