It was revealed to {God told} them that it was not for their own sake that he was revealing these things to them, but that it was for your sake. It was these things that were proclaimed to you by those who told you the message about Christ {that those who told you the message about Christ proclaimed to you}. They proclaimed these things to you because the Holy Spirit whom God sent from heaven enabled them to do that. And even angels would like to know more about these truths about how God saves us.