We are told to resist the enemy, and it is he who will take flight.
It seems to me that it is the Believer who so often takes flight. We have been given the armor, the Sword, and instruction to stand. There is no reason for passivity or ungodly compromise.
While it is not by our strength, we are expected to actively appropriate what we have been given and we are to affirmatively run the race.
The flesh operates in greasy seduction. As Amy Carmichael put it, ". . . Silken self. . ." Without God's Word afresh and private prayer (which I believe should be aloud) there is no energy or endurance for the battle. This is the greatest lack in the church today and the reason so many Christians are seeking to feel good and are ending in shipwreck.
Soldier of The Cross, look straight ahead. The busier you are, the more you must protect your private time with the Lord. Then there is sight. Then, there is a drawing on His strength. Then, the insignificant exposes itself.
Then, He can be seen.