Romans 6:18-19

6:18 and having been freed from sin, you became enslaved to righteousness. 6:19 (I am speaking in human terms because of the weakness of your flesh.) For just as you once presented your members as slaves to impurity and lawlessness leading to more lawlessness, so now present your members as slaves to righteousness leading to sanctification.

tn Or “because of your natural limitations” (NRSV).