And [when] Paul laid hands on them, the Holy Spirit came upon them and they began to speak in tongues and to prophesy.

Not all have gifts of healing, do they? Not all speak in tongues, do they? Not all interpret, do they?

I am willing, indeed, that you should all speak in tongues, but rather that you should prophesy; for greater is he that prophesies than he that speaks in tongues, unless he interprets, in order that the church may receive instruction.

I thank God that I speak in tongues more than all of you,

So if the whole church comes together and all speak in tongues, and unbelievers or uninformed people enter, will they not say that you have lost your minds?

Therefore, my brethren, desire earnestly to prophesy, and do not forbid to speak in tongues.