Warring against our flesh
Self-control over desires of the flesh makes a person physically strong, and if this person also lives a spiritual life the person becomes spiritually strong as well.
When you are at war with your urges, it means that you are fighting and intend to win. If you are not at war, then that means you have given up resistance.
From the book “From the Ascetic and Hesycastic Athonite Tradition” Translated by Anna Pipinos and Elias Pipinos.