What took place in the visible natural realm in the Old Covenant takes place in the invisible spiritual realm in the New. The Psalmist says in Psalm 44 verse 5:
5 Through You we will push down our enemies;
Through Your name we will trample those who rise up against us.
We have enemies today, those who rise up against us, but they are not the enemies of the Old Testament, people such as the Amalekites or Philistines. They are not people at all. They’re invisible enemies.
Paul makes clear the nature of our enemy in Ephesians 6:12:
12 For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age,[a] against spiritual hosts of wickedness in the heavenly places.
The enemies of God’s people in the Old Testament were literal flesh and blood, earthly principalities and powers. For us now they are invisible principalities, powers, rulers and hosts of wickedness. In the Old Testament the enemy attacked from the outside. Now the enemy attacks from the inside, with such weapons as fear, insecurity, hatred and jealousy, far more potent than the physical armory of the Old Testament.
But we also have a more potent defense. Just as the enemy attacks from the inside, God supplies us with weaponry on the inside. Against fear He brings His peace, against insecurity He brings His reassurance, against hatred He brings His love and against jealousy He brings His freedom from comparing and competing.
By His power within us we get to push down our enemies and trample down those things that rise up against us, that threaten to spiritually drown us and rob us of life.
In the New Covenant the enemy is closer to home, but our weaponry is closer still. Colossians 1:27 spells it out:
Christ in you, the hope of glory.
Christ is the source of all our weapons against the enemy, and He’s within us.
The enemy is close but Christ is closer still.