3 guidelines for tongues:
If the tongues-speakers have not experienced the gift of interpretation, and if no one with this gift is present, then they are to remain silent and should pray to God in tongues in private.
3 guidelines for prophecy:
A Christian worship is radically different from the mania of the pagan cults which was characterized by frenzy and disorder. "spirit of the prophets" = the prophetic Spirit by which each of them speaks through his or her own spirit
"Peace" refers to the sense of harmony that will occur in a Christian assembly when everyone is truly in the Spirit and the aim of everything is the edification of the whole. It does not necessarily mean somber ritual; worshipping with spontaneity or joy can still be peaceful.
All the churches of the saints are intended to be orderly. Thus orderliness not only conforms to the character of God but also in step with the rest of his churches.
Some translations put the phrase "in all the congregations of the saints" as part of v.34. The problem is that it would then read: "As in all the churches of the saints women should remain silent in the churches" which contains a redundant phrase "in the churches".
(a) The verses apparently apply to married women alone. The possible problem is that some women were shouting out disruptive speech during worship (asking their husbands questions) in Jewish synagogue where women and men are separated into two sides.
(b) Women at that time lived most of their lives at home. Once they got outside, they had a great tendency to try to catch up on the news, even during worship. Paul asks the women simply not to chat (to "hush up", not to "shut up") as it is disruptive to the service. The Greek verb here means chatter or converse.
(c) The prohibition is against speaking tongues by women as there may be actual cases of women disrupting the assembly with tongues.
Textual studies of the original manuscripts cast doubt on the authenticity of these two verses because:
Paul challenges whether God has given them a special word that allows them both to reject Paul's instructions and be so out of touch with the other churches.
Paul challenges the Corinthians for their perspective on spirituality; he claims that the Lord is the source of what he has been writing.
"spiritually gifted" is more accurately translated as "a person of the Spirit".
Final summary of the whole chapter: (a) reaffirming the priority of prophecy, (b) not forbidding tongues, (c) everything to be done in a fitting and orderly way.
(b) Is there uniform witness in the Bible? If there are different positions, then the command is not absolute, e.g. eating food offered to the idols (Ac 15:29, 1Co 10:25-26).
(c) Do we share similar specific life situations? The cultural setting of Biblical passages and the intent or reason of the command must be understood, e.g. prohibitions in Ac 15:20 as a compromise to satisfy Jewish Christians.