The battle with the flesh

The flesh will manipulate and control your mind if you allow it.  

For the desires of the flesh are opposed to the [Holy] Spirit, and the [desires of the] Spirit are opposed to the flesh (godless human nature); for these are antagonistic to each other (continually withstanding and in conflict with each other], so that you are not free but are prevented from doing what you desire to do. Galatians 5:17 AMP