1 John 2:29

Because God is righteous, every abiding child of God will demonstrate righteous behavior. Righteous action is a mark of the Father that God reproduces in every abiding Christian just as surely as every child does some things like the physical parent he or she seeks to imitate. We intellectually know that God is righteous from Scripture. However we experientially come to know that certain people are abiding Christians by the righteous works they do. The facts that some unrighteous people behave righteously and some righteous people behave wickedly do not vitiate this point.

"We must not make this verse say more than it does. John certainly does not say, ’Whoever does not do righteousness is not born of Him.’ That would be an inference in no way justified by John’s statement. He is not talking here about how we can decide if a person is saved. If we know that a person believes (cf. 1 John 5:1 . . .), we can know he is saved. But here, John is clearly concerned with the deduction which we can make if we know that God is righteous. If that is known, it follows that one who to any extent reproduces His righteous nature is actually manifesting that nature and can rightly be perceived as born of Him." [Note: Ibid., p. 127.]