We come now to ἀμώμητος (amomatos), "without rebuke," found only twice in the New Testament (Phil. 2:15), "that ye may be children of God without rebuke," and (2 Pet. 3:14) a text already quoted, "that ye may be found in him without spot and blameless," or without rebuke.
There is another word for unblamable, ἄμωμος (amomios), used by Paul three times in portraying perfect Christians. Eph. 1:4, "According as he hath chosen us [believers] in him before the foundation of the world, that we should be holy, and without blame before him in love." Love is always the sphere in which holiness and blamelessness are found. Eph. 5:27, "That it [the church] should be holy and without blemish." Col. 1: 22, "Unblamable and unreprovable in his sight": not merely in man's sight. who is incapable of penetrating the invisible springs of action wherein real character lies. Jude 24, R. V., "And to set you before the presence of his glory, without blemish in exceeding joy." We are not to be found faultless in some dark corner of the universe, where flaws and flecks would be unnoticed, but faultless amid the splendors of his ineffable glory. This is what divine grace as mediated by the Holy Spirit, the Sanctifier, is able to do for the weakest saint who perseveringly trusts in Jesus Christ, the adorable Son of God and Savior of men.
Another once-used word, ἀμετακίνητος (ametakinatos), "unmovable," occurs in 1 Cor. 15:58, " that ye may be unmovable," like the granite cliff unshaken by the tornado and the tidal wave. Such vertebrate Christian men and women dwelling in houses of clay may become when "strengthened with might by his Spirit in the inner man."
— Half-Hours With St. Paul, Chapter 18.