We live in the flesh, but our fight is spiritual.

For though we may be living in the flesh, we are not fighting after the way of the flesh:
2 Corinthians 10:3

¹⁾2Co 10:4  For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds; 
2Co 10:5  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; 

2Co 10:4 For the arms with which we are fighting are not those of the flesh, but are strong before God for the destruction of high places;
2Co 10:5 Putting an end to reasonings, and every high thing which is lifted up against the knowledge of God, and causing every thought to come under the authority of Christ;