'Pure' in the Bible

The head of the statue was pure gold, its chest and arms were silver, its stomach and thighs were bronze,

I beheld till the thrones were cast down, and the Ancient of days did sit, whose garment was white as snow, and the hair of his head like the pure wool: his throne was like the fiery flame, and his wheels as burning fire.

and I lift up mine eyes, and look, and lo, a certain one clothed in linen, and his loins girt with pure gold of Uphaz,

Some of those who have insight will fall, in order to refine, purge and make them pure until the end time; because it is still to come at the appointed time.