Your mind is the birthplace, the incubator, the beginning point of everything you do. Satan knows this. His entire strategy is to break your focus, sabotage your concentration and abort your assignment from God.
So, the real battleground of life is your mind. Guard it well.
“Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.”
(Philippians 4:8)