Personally, I believe there is much I could learn about speaking in tongues. I’m not part of a tradition nor am I from a part of the world that embraces it as much as others. That said, I think I can still understand some of what Paul wants us to learn in 1 Corinthians 14 in regards to the practice.
I think it’s clear from Paul’s writing in this chapter and in the ones preceding that speaking in tongues does has a place and a function in the body of Christ. But that place is not primarily in public worship and its function isn’t for boasting and it’s not to be a litmus test as to whether or not you have the Spirit. After all, it is just one of many gifts of the Spirit, and each is gifted according to God’s will.
Unfortunately this is how tongues is presented in some churches. To those churches whether or not your speak in tongues is the sign of if you have the Spirit of God. It is treated as the sign and the gift above others. That is not building up the body and instead it’s dividing it between the haves and have-nots. That is not the reason we’ve been given these gifts by God.
That reason, the building up, is so important and it is why Paul placed prophecy above speaking in tongues in this section. Speaking in tongues is a more personal, private gift, but prophecy is one that builds up the body, believer and even unbeliever. He doesn’t want to demean speaking in tongues, and he mentions that he does it himself. But he does want to focus more on the goal behind these gifts, that is, of building up the body.