For I know that in me, that is, in my flesh, dwelleth no good thing. for to will is present with me, but to do that which is good is not. Romans. 7.18.
Romans 6 speaks of our co-death with Christ; Romans 7 speaks of the battle between the new and the old lives; and Romans 8 speaks of the victory in the Holy Spirit. Both verse 6 and verse 11 of Romans 6 tell us that the death of our “self” is a fact. Why, then, do many believing in this truth—fail to experience the victory of Romans 8? It is because they have not failed enough.

God will let a believer fall until he willingly acknowledges, “I am sold under sin! There is no good in me!” Not till then will he know that except a power comes from outside, he is hopeless and helpless. But then will we cry out: “Wretched man that I am! Who shall deliver me?” When he really perceives how corrupt he is, he will then know and acknowledge that unless Christ rescues him he cannot overcome sin.