2 Chr 20:14-15, Ps 44:6-7, Hos 1:7, 2 Cor 10:3-5
War belonged to God. (1 Samuel 17:45-47, 2 Chronicles 20:14-15)
1 Samuel 17:45 Then said David to the Philistine, Thou comest to me with a sword, and with a spear, and with a shield: but I come to thee in the name of the Lord of hosts, the God of the armies of Israel, whom thou hast defied. 46 This day will the Lord deliver thee into mine hand; and I will smite thee, and take thine head from thee; and I will give the carcases of the host of the Philistines this day unto the fowls of the air, and to the wild beasts of the earth; that all the earth may know that there is a God in Israel. 47 And all this assembly shall know that the Lord saveth not with sword and spear: for the battle is the Lord's, and he will give you into our hands.
2 Chronicles 20:14 Then upon Jahaziel the son of Zechariah, the son of Benaiah, the son of Jeiel, the son of Mattaniah, a Levite of the sons of Asaph, came the Spirit of the Lord in the midst of the congregation; 15 And he said, Hearken ye, all Judah, and ye inhabitants of Jerusalem, and thou king Jehoshaphat, Thus saith the Lord unto you, Be not afraid nor dismayed by reason of this great multitude; for the battle is not yours, but God's.
We cannot save us by our own power. Only God saves us from our enemies. (Psalm 44:6-7, Hos 1:7)
Psalm 44:6 For I will not trust in my bow, neither shall my sword save me. 7 But thou hast saved us from our enemies, and hast put them to shame that hated us.
Hos 1:7 But I will have mercy upon the house of Judah, and will save them by the Lord their God, and will not save them by bow, nor by sword, nor by battle, by horses, nor by horsemen.
We are to take every theory and thought captive and submit it to Christ. (2 Corinthians 10:3-5)
2 Corinthians 10:3 For though we walk in the flesh, we do not war after the flesh: 4 (For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;) 5 Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;