Angels reveal or help with God's ministry plan

Acts 5:19–20 (ASV)

¹⁹But an angel of the Lord by night opened the prison doors, and brought them out, and said, ²⁰Go ye, and stand and speak in the temple to the people all the words of this Life.

Acts 8:26 (ASV)

²⁶But an angel of the Lord spake unto Philip, saying, Arise, and go toward the south unto the way that goeth down from Jerusalem unto Gaza: the same is desert.

Acts 27:21–26 (ASV)

²¹And when they had been long without food, then Paul stood forth in the midst of them, and said, Sirs, ye should have hearkened unto me, and not have set sail from Crete, and have gotten this injury and loss. ²²And now I exhort you to be of good cheer; for there shall be no loss of life among you, but only of the ship. ²³For there stood by me this night an angel of the God whose I am, whom also I serve, ²⁴saying, Fear not, Paul; thou must stand before Caesar: and lo, God hath granted thee all them that sail with thee. ²⁵Wherefore, sirs, be of good cheer: for I believe God, that it shall be even so as it hath been spoken unto me. ²⁶But we must be cast upon a certain island.