Here are a couple of question to ponder from Ole Hallesby:
Do I really desire to be set free from the lukewarmness of my heart and worldly life?
Is not my Christian life always lukewarm and half-hearted for the simple reason that deep down in my heart I desire it to be that way?
If you find this to be true of your heart, as I sometimes do, you may find John Piper’s book, When I Don’t Desire God, to be beneficial. It is available free from Desiring God Ministries: here