All right, you say, those times are beautiful, but they are rare in my life. Listen, setting your mind on things above does not happen automatically. Until we get to heaven there will always be within us that which opposes aspiration. Even though every Christian has the Holy Spirit to empower the new life, there is still going to be conflict because of the flesh. You are free to drive the new one, but you must take a definite action to stop driving the old car.
Aspiration includes putting gas in the new car.
It is like putting bad gas in the wrong car. Setting our minds on things above will not only keep us from sin, but will continually result in a more Christ-like life. Like walking, aspiration is not automatic, but is learned and practiced step by step . Now this in no way implies literal amputation or mutilation of our bodies. It implies, rather, a ruthless rejection of all habits and practices which we know to be wrong.