Having refined or subtle bodies of light, angels move very rapidly and permeate or penetrate all realms of existence. As they place themselves in our eyelids or in the bodies of other beings to observe the works of God through our or their eyes, they also descend into the hearts of the Prophets and saintly people and breathe inspirations into them. The inspirations occurring to the hearts of saintly people are usually from God but they may sometimes be from angels.