Romans 6:21

What fruit had ye then in those things - God designs that every man shall reap benefit by his service. What benefit have ye derived from the service of sin?

Whereof ye are now ashamed? - Ye blush to remember your former life. It was scandalous to yourselves, injurious to others, and highly provoking to God.

The end of those things is death - Whatever sin may promise of pleasure or advantage, the end to which it necessarily tends is the destruction of body and soul.

What fruit, then ... - What reward, or what advantage. This is an argument drawn from the experience of Christians respecting the indulgence of sinful passions. The question discussed throughout this chapter is, whether the gospel plan of justification by faith leads to indulgence in sin? The argument here is drawn from the past experience which Christians have had in the ways of transgression. They have tried it; they know its effects; they have tasted its bitterness; they have reaped its fruits. It is implied here that having once experienced these effects, and knowing the tendency of sin, they will not indulge in it now; compare Romans 7:5.

Whereof ye are now ashamed - Having seen their nature and tendency, you are now ashamed of them; compare Romans 1; Ephesians 5:12, "For it is a shame to speak of those things which are done of them in secret," 2 Corinthians 4:2; Jde 1:13; Philippians 3:19.

For the end - The tendency; the result. Those things lead to death.

Is death - Note, Romans 6:22.

6:21 Those things - He speaks of them as afar off.