'Opinion' in the Bible

Now concerning virgins I have no command of the Lord, but I give an opinion as one who by the mercy of the Lord is trustworthy.

But in my opinion she is happier if she remains as she is; and I think that I also have the Spirit of God.

I give my opinion in this matter, for this is to your advantage, who were the first to begin a year ago not only to do this, but also to desire to do it.