“‘How can I best serve Thee—Thy will (not mine) be done.’ These are thoughts which must go with us constantly.” (Chapter 6, Big Book)
“Step Eleven suggests prayer and meditation. We shouldn’t be shy on this matter of prayer. Better men than we are using it constantly.” (Ibid.)
“We constantly remind ourselves we are no longer running the show, humbly saying to ourselves many times each day ‘Thy will be done.’” (Ibid.)
“Be sober, be vigilant; because your adversary the devil walks about like a roaring lion, seeking whom he may devour.” (1 Peter 5:8)
The reason it says ‘constantly’ is because self (the ego, the adversary, the devil, the lion) is constantly prowling.