Speaking in tongues is uttering words in an unknown language by the Inspiration of the Holy Spirit. Prophecy is a supernatural utterance in a known language by the Inspiration of the Holy Spirit for edification, comfort, and exhortation of the Saints. Speaking in tongues plus the interpretation of tongues is equal to prophecy. There is the simple gift of speaking in tongues, which is needed for the Christian's private prayer life and personal edification; and there is the gift of diverse or different kinds of tongues for public ministration.