And he said, Go thy way, Daniel: for the words are closed up and sealed till the time of the end. Many shall be purified, and made white, and tried; but the wicked shall do wickedly: and none of the wicked shall understand; but the wise shall understand." Daniel 12:9,10 (KJB)"
"Purified and made white" refers to the aura. Christian preachers when preaching on the pulpit often have temporarily white auras, like Buddhists when chanting or Hindus when meditating. People who do a lot of etheric clearing tend to have more permanently white auras in just everyday life.