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.

 (a) When a leper had been healed, he was sprinkled with the blood of a bird ( Leviticus 14:1-7). Sprinkling with blood is, therefore, the symbol of cleansing. By the sacrifice of Christ, the Christian is cleansed from sin. 