Without the other, I could not see myself--and even when the other sees me inaccurately or with a bias to do harm, I am still his debtor for what he reveals in me. At times, the enemy may even see me more clearly than does my friend. I am a debtor to him for a perspective about me that invigorates my search to know who I am.
An enemy is also the window of truth. If I am humbled by what my enemy reveals in my heart, then I am better prepared to listen to his claims against me. Our enemies would not be troubling to us if they did not bring to our attention truths that we have not taken into account or articulated well for life. An enemy not only invites us to intimacy but provide clarity to grow in truth.