2 ENEMIES of Change:

One weapon Satan will use to stop you from changing is discouragement. He wants you to think you can't change, that it is impossible for you to let go of old habits. Don't believe him for a minute! Put your confidence in God and His Word. Believe what He has said about you, and know that when the Word is on the inside of you, you will be equipped to make decisions that keep you on the path
AND:
Also, realize fear is a foreign spirit that does not come from God. If you are ever afraid of something, you can have confidence that the fear is coming from Satan. A Christian’s reborn spirit does not produce fear, so if fear comes, it is an attack of the enemy against your soul.- 

   Creflo Dollar