
I see your point! And, no, it is not 'off subject'.
You fell into the same trap that we all seem prone to find and step into. It is something I have to guard against continually, i.e. not reading the passage is written and in the context of the subject matter.
The verse 23 reads:If therefore
the whole church be come together into one place, and all speak with tongues, and there come in [those that are] unlearned, or unbelievers, will they not say that ye are mad?
Within the context of chapter 14, Paul is making two points. The first is that everything is to be done in order and decency. The second point is that if everyone is speaking in a different language, with no interpretations, consider the noise and confusion that would ensue. Say a congregation of 25 people speaking in 5 to 25 different languages - all at the same time!
We can then see Paul's instructions in this light: Regardless of the language being spoken (known human language or a message from the Spirit in a 'heavenly' language). If presented one at a time, with interpretation, then God is glorified and the unbeliever, or the one who is unlearned [in spiritual matters], might be then convicted of the reality of Jesus Christ.
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