Here is a video I made on the question: How do angels speak with and enlighten humans? This question was addressed in a text from the 13th century by Thomas Aquinas. In the video the context of the question as well as Aquinas’ answer are explained. The angels communicate with humans through images and light. At the end a practical point about communicating with the angels is addressed.
The painting of Saint John on the island of Patmos, receiving the visions of the Apocalypse from an Angel, is part of a tryptic I made for the Church of All Saints in Concord, New Hampshire. The imagery of the Cross in the middle, and Mary and John on the sides, is all taken from the book of the Apocalypse.