This is a war and we can't have people on the battlefield who are fearful and afraid. God always, always, sends people who are fearful and afraid home.
This battle is not for the faint of heart.
The battle always looks impossible but...it's always a mirage!
God is in control.
The mountain can move. People can be defeated. It, and they, are programs made by the Word of God, Jesus Christ, the Architect of our Universe. This is his world. Battles are not won by resources, they are won through faith and obedience to the unlimited and Almighty God. "Now therefore go to, proclaim in the ears of the people, saying, Whosoever is fearful and afraid, let him return and depart early from mount Gilead. And there returned of the people twenty and two thousand; and there remained ten thousand." (Judges 7:3) "And Jonathan said to the young man that bore his armor, Come, and let us go over unto the garrison of these uncircumcised: it may be that the LORD will work for us: for there is no restraint to the LORD to save by many or by few." (1Samuel 14:6)