'Opinion' in the Bible

About virgins: I have no command from the Lord, but I do give an opinion as one who by the Lord’s mercy is trustworthy.

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

Now I am giving an opinion on this because it is profitable for you, who a year ago began not only to do something but also to desire it.