The Apostle Paul
Romans 5:9BSB·traditional attribution

Therefore, since we have now been justified by His blood, how much more shall we be saved from wrath through Him!

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

Much more then being now justified by his blood,.... The apostle here argues from justification by Christ to salvation by him, there being a certain and inseparable connection between these two; whoever is justified shall be saved; and speaks of justification "as being now by his blood".

Albert Barnes Presbyterian @notesbybarnes

Verse 9. Much more then. It is much more reasonable to expect it. There are fewer obstacles in the way. If, when we were enemies, he overcame all that was in the way of our salvation, much more have we reason to expect that he will afford us protection now that we are his friends. This is one ground of the hope expressed in . Being now justified.