OK, so I am not talking about our natural, physical tongues but supernatural , spiritual tongues.
Here are four reasons we need to speak in tongues.
WE DON’T ALWAYS KNOW HOW TO PRAY
Likewise the Spirit also helps in our weaknesses. For we do not know what we should pray for as we ought, but the Spirit Himself makes intercession for us with groanings which cannot be uttered.
So too the [Holy] Spirit comes to our aid and bears us up in our weakness; for we do not know what prayer to offer nor how to offer it worthily as we ought, but the Spirit Himself goes to meet our supplication and pleads in our behalf with unspeakable yearnings and groanings too deep for utterance.
WE CAN’T ALWAYS FIND WORDS TO EXPRESS OUR THANKS
What is the conclusion then? I will pray with the spirit, and I will also pray with the understanding. I will sing with the spirit, and I will also sing with the understanding.
I Corinthians 14:15
WE ARE CONSTANTLY NEEDING TO BE BUILT UP
He who speaks in a tongue edifies(builds up) himself, but he who prophesies edifies the church.
I Corinthians 14:4
But you, beloved, building yourselves up on your most holy faith, praying in the Holy Spirit ….
WE NEED ANSWERS THAT ONLY GOD HAS
For he who speaks in a tongue does not speak to men but to God, for no one understands him; however, in the spirit he speaks mysteries.
I Corinthians 14:2