The Apostle Paul
Romans 5:6ESV·traditional attribution

For while we were still weak, at the right time Christ died for the ungodly.

John Calvin Reformed @genevareformer

6. For Christ, etc. I ventured not in my version to allow myself so much liberty as to give this rendering, “In the time in which we were weak;” and yet I prefer this sense. An argument begins here, which is from the greater to the less, and which he afterwards pursues more at large: and though he has not woven the thread of his...

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 when we were yet without strength,.... The apostle having mentioned the love of God proceeds to give an instance, and which is a full proof and demonstration of it, which is, that in due time Christ died for the ungodly.