The Apostle Paul
Romans 6:21ESV·traditional attribution

But what fruit were you getting at that time from the things of which you are now ashamed? For the end of those things is death.

John Calvin Reformed @genevareformer

21. What fruit, then, etc. He could not more strikingly express what he intended than by appealing to their conscience, and by confessing shame as it were in their person. Indeed the godly, as soon as they begin to be illuminated by the Spirit of Christ and the preaching of the gospel, do freely acknowledge their past life, which they have lived without Christ, to...

Matthew Henry Presbyterian @wholebiblehenry

The apostle's transition, which joins this discourse with the former, is observable: "What shall we say then? Rom 6:1. What use shall we make of this sweet and comfortable doctrine? Shall we do evil that good may come, as some say we do? Rom 3:8. Shall we continue in sin that grace may abound?

Commenting on Romans 6:1-23

John Gill Reformed Baptist @doctorgill

What fruit had ye then in those things?.... That is, what profit, pleasure, satisfaction, or comfort, had ye in the commission of sin? Sin yields no real profit to the servants of it. If a man, by sinful practices, could amass together the riches of the Indies, or gain the whole world, yet if his soul is lost thereby, what advantage would it be to him?