Laws of Warfare
Deuteronomy 20:1 When you go out to battle against your enemies and see horses and chariots and people more numerous than you, do not be afraid of them; for the LORD your God, who brought you up from the land of Egypt, is with you.
2 When you are approaching the battle, the priest shall come near and speak to the people.
3 He shall say to them, 'Hear, O Israel, you are approaching the battle against your enemies today. Do not be fainthearted. Do not be afraid, or panic, or tremble before them,
4 for the LORD your God is the one who goes with you, to fight for you against your enemies, to save you.' , do not be afraid of them; for the LORD your God, who brought you up from the land of Egypt, is with you.
Horses and chariots symbolize our enemy, or any obstacle we face. Note how it is phrased, "more numerous than you." How many of us have faced, or are facing things so big that it is as an army more numerous than us? Notice the command, "Do not be afraid of them." Why? Because the Lord who brought us out of darkness and into the light (remember, we are living in the NT) is with us.
Just as the priest did then, our priest approaches us as we head into battle. We know from Hebrews Jesus is our High Priest, who has already defeated the enemy, making a show of him openly, as written in Colossians.
I hear the Lord Himself through the written Word say this to us,
Do not let your hearts be troubled, neither let them be afraid. [Stop allowing yourselves to be agitated and disturbed; and do not permit yourselves to be fearful and intimidated and cowardly and unsettled.] Be of good cheer [take courage; be confident, certain, undaunted]! For I have overcome the world. [I have deprived it of power to harm you and have conquered it for you.] And be sure of this: I am with you always, even to the end of the age.