I have never known a Christian to say he or she has never known periods of coolness or even numbness.
The thing is, something has to be done.
I had such a period in my own life over thirty years ago. I felt as though I could not function because the Lord seemed so far away. I knew the Bible said there was more, so I determined to step out and find more.
I was depressed to the extent that I could not pray in a normal way. I could not talk to anyone. But, I knew that a Christian did not have to live that way. So, I went out and found some good Christian biographies and read them daily. I read and read and read. I kept reading until I found a book that set my heart aflame and then I kept reading some more. (The trigger book was Freed For Life)
When I read the experiences of others, I began to be released to be able to pray freely. Aloud and daily. I had already been memorizing verses, but as I kept reading, I was able to understand that others had gone before and I could see their footprints in the deep mud of discouragement and circumstances.
To this day, I seek out the stories of those who have gone before. We need the testimonies of faith. We need the accounts of Leaning on the Everlasting Arms. We need each other, dead or alive.
Soldier of The Cross, He has never failed to answer anyone who has ever called to Him. If He has said that you should be being filled with the Holy Spirit, it must be possible. If He has said you must be zealous, it must be possible.
Present this to Him in prayer.
Aloud. He will lead you. After all, what you want is to know Him, to serve Him and to be available.
Do it today. Make sure it is aloud.