 Yes, you can cast out demons, but you can't cast you out of you. The flesh doesn't come and go. The flesh shrinks and grows depending upon the thoughts and decisions that you choose. This is why you must be attentive about keeping the flesh weak and the spirit strong. But I discipline my body and bring it into subjection lest, when I have preached to others, I myself should become disqualified, leave no opportunity for the flesh to gain influence and strength. Keep it weak.