God is a God of order.
Paul tells the Corinthians, and the modern day tongues movement, that if there is chaos and confusion while the gift of tongues is exercised, then it is not of God.
He then establishes the rules that are to govern the use of the spiritual gifts.
Listen to what the Word of God has to say about the practice of tongues and discover the history of the modern day tongues movement in this verse-by-verse study of 1 Corinthians 14:26-40.