The document discusses speaking in tongues based on passages from the Bible. It makes several key points: 1) Speaking in tongues is a spiritual gift where the human spirit prays or sings mysteries in a language given by the Holy Spirit. It allows one to pray and praise God without understanding. 2) Tongues are primarily used for praise, worship, prayer, singing, blessing and thanksgiving to God. 3) Tongues are a gift of the Spirit that individuals can use for personal edification, prayer and communing with God, even when alone. This allows one's spirit to be built up.