For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries. 1 Corinthians 14:2
One of the reasons the promises of God often do not manifest in our lives is because of doubt and unbelief. This doubt and unbelief is often the product of trying to figure out in our minds how what we are believing God for will come to pass in our lives. True faith comes out of our spirit though. John 4:24 says that “God is a Spirit: and they that worship him must worship him in spirit and truth.” We are created in God’s image and likeness according to Genesis 1:26, and are to function like He does. We are to operate in faith out of our spirit man. We are a spirit, we have a soul (mind, will, and emotions) and we live in a body. God is a Spirit and speaks to our spirits concerning His promises. That’s where the gift of speaking in tongues comes in. Speaking in tongues allows you to tap into your spirit and totally bypass the doubt and unbelief that the mind is subject to because you are not speaking out of reason or intellect. We must also get our mind and body in agreement with what He has spoken to our spirits. Your spirit is always ready to receive the promises of God because it “is created in righteousness and true holiness” like God (Ephesians 4:24). The more your spirit dominates your life the more the mind and body will follow suit and the more you will see the blessing of God manifest in your life.