'Mirror' in the Bible

For now we see in a mirror dimly, but then face to face; now I know in part, but then I will know fully just as I also have been fully known.

But we all, with unveiled face, beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as from the Lord, the Spirit.

For if anyone is a hearer of the word and not a doer, he is like a man who looks at his natural face in a mirror;