Chuck Swindoll in his Study Bible:
I have found that searching questions are one of the most helpful ways to deal with my heart when it grows cold and distant or hard and calloused. Here are a few searching questions that I ask myself on occasion:
Has worship become merely formal and proper for me?
Has prayer become a series of meaningless words, just a matter of moving filthy lips, like Isaiah says?
Does God seem strangely distant and out of touch?
Have I forgotten that He really sees me and knows exactly where I am, what I’m doing, and why?
Am I getting too preoccupied with externals?
Is human opinion too important to me?
Do I allow my will to invalidate the authority of God’s Word in my life?
Are there wicked things being tolerated, even cultivated, in the deep chasms of my being?
Have I stayed in this condition so long that I’ve become blind to theses things?
I urge you to ask yourself searching questions like these. If you do it honestly, you will find that God is willing to come into the deepest places of your heart and transform you. Chuck Swindoll