The Apostle Paul
Romans 5:19ESV·traditional attribution

For as by the one man’s disobedience the many were made sinners, so by the one man’s obedience the many will be made righteous.

John Calvin Reformed @genevareformer

19. This is no tautology, but a necessary explanation of the former verse. For he shows that we are guilty through the offense of one man, in such a manner as not to be ourselves innocent. He had said before, that we are condemned; but that no one might claim for himself innocence, he also subjoined, that every one is condemned because he is a sinner.

Matthew Henry Presbyterian @wholebiblehenry

The apostle here describes the fountain and foundation of justification, laid in the death of the Lord Jesus. The streams are very sweet, but, if you run them up to the spring-head, you will find it to be Christ's dying for us; it is in the precious stream of Christ's blood that all these privileges come flowing to us: and therefore he enlarges upon this...

Commenting on Romans 5:6-21

John Gill Reformed Baptist @doctorgill

For as by one man's disobedience many were made sinners,.... Agreeably to this the Jews say (g), that "for the sin of the first man, all that are born of him, , "become wicked".'' This is the sum of what is said in the foregoing verses, that as by Adam's sin all his posterity are made sinners, and so are brought under a sentence of...