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.

 (iii) The Christian is chosen for obedience and for sprinkling by the blood of Jesus Christ. In the Old Testament there are three occasions when sprinkling with blood is mentioned. It may well be that all three were present in Peter's mind and that all three have something to contribute to the thought behind these words. 