OK, you wanted me to explain how sin was able to use the ten commandments to arouse all manner of sin/concupiscence in Saul. We really do need to consider scripture, not just quote it. Imagine a teenager who has made a commitment to God. They believe obeying the letter of the law is everything. Eternal life hinges on it. Before them is the Ten Commandments. They know God can forgive sin, however, that does not mean you can break the law does it, especially the big ten. The teenager understands what the law demands, they are not in ignorance of it. Before them is ‘’Thou shalt not covet’’ This commandment must be obeyed or they are condemned, for they would be failing to obey the law wouldn’t they. Now picture a teenager faced with this situation. They must not have or dwell on impure thoughts/lust. The commandment states: ‘’Thou shalt not’’ So what happens when an impure thought comes to them? They would be desperate to get rid of it, eternity hinges on obeying the letter. You see, you cannot start excusing sin can you, by saying it is only what goes on, on the inside of man, it is not so important. It is, breaking the ten commandments. Now in the real world, a young teenager would inevitably be petrified of impure thoughts, if(if) they were as ardent as was Saul concerning his religion, he dedicated his life to it. Now what do you think would happen if someone was determined never to covet for if they do they were in danger of hellfire. THEY MUST NOT COVET! If you understand human nature you will know the result:
What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
8 But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. Romans7:7&8
Hence, sin used what was good and holy and righteous to arouse all manner of sin in Saul through the commandment. Before he made that commitment he felt alive for their was no condemnation then, for he was not obligated to obey the letter of the law to inherit eternal life. And hence, the power of sin is the laws ability to condemn.
Of course, Saul being a Pharisee did not understand the truth, the bottom line was not obeying the letter of the law. David understood the truth:
I trust in your unfailing love forever and ever.
For Daavid knew, no one was truly righteous before God
TBC