The Bible says, “For God has not given us the spirit of fear; but of power, and of love, and of a sound mind.” 

We see from this verse that God is not the Authour of fear and in Him there is no fear. 

God cannot give us anything that He does not have. 

The Creator God of this whole universe is saying to you: ‘Call unto me in prayer and I will answer you. I will show you great and mighty things which you still do not know about.’ Jeremiah 33:3

The Word says, "Be not overcome of evil but overcome evil with good." Take the good thought, the good image, and fill your mind and heart with that. When you do so, the bad images will disappear.