When those desires become more to you then your relationship with God. To know His heart, to know His Word, and His desire for you and your life. We can't be lukewarm, when we are undecided abut who's we are we have a war within ourselves. That evil desire wars with our desire for God. To increase our desire for God means we increase our faith, our love, and our wanting to do God's will. whe we dwell on evil desires, we move away from God and lean on our own selfish desires. This is what the enemy wants, to put us away from God. But if we maintain our focus on Him who has made us, we grow in our desire to serve Him and to Trust in Him.