Before the children of Israel could ever live peacefully in the land that the Lord God had given them they had to eradicate every enemy from their land. God commanded them to be courageous because fear is an enemy to progress.
Now the word cowardice is opposite of courageous. A coward is someone who attacks someone who is weaker than them or someone who is unable to defend themselves.
Satan is a coward. Satan knows his position of defeat under our feet through and in Christ Jesus. He is a coward to those in the world without Christ because they are defenseless against his strategies and attacks but we are not. Jesus said I give you power over all the power of the enemy and nothing shall by any means harm you.
We must detoxify and rid our soul of the notion that we are inferior to Satan and the kingdom of darkness or that he still has some sort of authority over our lives.
Be strong and of a good courage: for unto this people shalt thou divide for an inheritance the land, which I sware unto their fathers to give them.
Only be thou strong and very courageous, that thou mayest observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest prosper withersoever thou goest.
• The ability to face danger, difficulty, uncertainty, or pain without being overcome by fear or being deflected from a chosen course of action