To them it was revealed, that not to themselves, but to you, did they minister these things, which now have been announced to you through those who preached the Gospel to you by the Holy Spirit sent out from heaven; which things angels desire to look into.

 Peter has been talking about the greatness and the glory to which the Christian may look forward; but the Christian can never be lost in dreams of the future; he must always be virile in the battle of the present. So Peter sends out three challenges to his people. 