When it comes to sanctification, you have to decide what you believe. Do you believe that you were sanctified partially at salvation, and now you have to do something to complete the sanctification? If so, the completion of your sanctification is up to you. Or do you believe that your sanctification was complete, at the moment of belief, for all time? If so, God is the one who works out what He's done in you. Is it up to you or God?