'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, even as I was also fully known.

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

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