'Lost' in the Bible

If anyone’s work is burned up, it will be lost, but he will be saved; yet it will be like an escape through fire.

For through your knowledge (spiritual maturity) this weak man is ruined [that is, he suffers in his spiritual life], the brother for whom Christ died.

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?

Yes, even those who have died believing in the Messiah are lost.