Adam Clarke on Romans 3:28

Therefore we conclude, etc. - Seeing these things cannot be denied, viz., that all have sinned: that all are guilty, that all are helpless: that none can deliver his own soul, and that God, in his endless mercy, has opened a new and living way to the holiest by the blood of Jesus, Heb 10:19, Heb 10:20, etc: therefore we, apostles and Christian teachers, conclude, λογιζομεθα, prove by fair, rational consequence, that a man - any man, is justified - has his sins blotted out, and is received into the Divine favor, by faith in Christ's blood, without the deeds of the law, which never could afford, either to Jew or Gentile, a ground for justification, because both have sinned against the law which God has given them, and, consequently, forfeited all right and title to the blessings which the obedient might claim.