Many shall purify themselves and make themselves white and be refined (Dan 12:10A, ESV). 
	
	
	
		
		
		
		
	
	
  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 [Dan. 12:10].
"These great principles of God prevail from Daniel’s day to the time of the end, irrespective of dispensations:
1. “Many shall be purified” refers to those who have come to Christ, “Not by works of righteousness which we have done, but according to his mercy …” (Titus 3:5).
2. “None of the wicked shall understand” refers to the natural man. “But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned” (1 Cor. 2:14).
3. “But the wise shall understand.” “Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come” (John 16:13)." McGee, J. V. (1991). Thru the Bible commentary: The Prophets (Daniel) (electronic ed., Vol. 26, pp. 196–197). Nashville: Thomas Nelson.