Daniel 12:10

Be purified, and made white. Or, “purify themselves and make themselves white,” or, “show themselves to be pure and white.” While man cannot of his own power purify himself, he can show forth by his life the fact that God has purified him. This forms a contrast with the following clause, “but the wicked shall do wickedly.”

Shall understand. A guarantee that those in the last days who study devoutly and intelligently will understand God’s message for their time.