Romans 7:17

So now it is no more. that do it, but sin which dwelleth in me. "no more. that do it" -clearly Paul isn't saying that he is not responsible for his sins, or that he can't help himself. (Romans 6:12; Romans 6:16; Romans 6:19) In the previous verse he has clearly stated his own personal responsibility, when he says, "I" do the very thing "I" do not wish to do (Romans 7:16). Paul was. man who willed and desired something he couldn't come up with. 'This being so, the action is no longer my own' (TCNT)

"but sin which dwelleth in me" -note: Paul had already confessed that "I" do it (Romans 7:16); 'but sin which dominates me' (Lam).

"dwelleth" -in the same sense that Christ dwells in one (Galatians 2:20). In the sense of 'influences'.