Final answer:
The phenomenon of tongues in Acts is about the Apostles speaking in different languages to spread the message of Christ, while in 1 Corinthians, it refers to a spiritual gift of unknown language for prayer and praise.
Step-by-step explanation:
In the Book of Acts, the phenomenon of tongues is described as the ability of the Apostles to speak in different languages through the inspiration of the Holy Spirit. This occurred on the day of Pentecost, as described in Acts 2. The purpose of this phenomenon was to enable the Apostles to effectively spread the message of Christ to people of different languages and cultures.
In contrast, in 1 Corinthians, the phenomenon of tongues is described as a spiritual gift given to individual believers in the early Christian community. It is a form of prayer or praise expressed in a language that is unknown to the speaker and often requires interpretation. The purpose of this gift is to edify and build up the individual and the church.