I speak after the manner of men because of the infirmity of your flesh: for as ye presented your members [as] servants to uncleanness and to iniquity unto iniquity, even so now present your members [as] servants to righteousness unto sanctification.
Romans 6:17 But thanks be to God, that, whereas ye were servants of sin, ye became obedient from the heart to that form of teaching whereunto ye were delivered;
Romans 6:18 and being made free from sin, ye became servants of righteousness.
Romans 6:19 I speak after the manner of men because of the infirmity of your flesh: for as ye presented your members [as] servants to uncleanness and to iniquity unto iniquity, even so now present your members [as] servants to righteousness unto sanctification.
Romans 6:20 For when ye were servants of sin, ye were free in regard of righteousness.
Romans 6:21 What fruit then had ye at that time in the things whereof ye are now ashamed? for the end of those things is death.
The verse centers on "speak", "after", "manner", "infirmity", "flesh", "presented", "members", and "servants". It is saying that the verse draws attention to "speak" and "after", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 18's "and being made free from sin ye..." into verse 20's "For when ye were servants of sin...", so "speak" and "after" belong inside that flow. In Romans context, the local focus is righteousness by faith, union with Christ, life in the Spirit, and God's covenant faithfulness.
A plain takeaway is to answer the verse's own emphasis on "speak" and "after" with trust shaped by these words, not by a vague optimism outside the passage.