In the Christian world... it is believed that angels were created at the beginning, and that heaven was formed of them; and that the Devil or Satan was an angel of light, who, becoming rebellions, was cast down with his crew, and that this was the origin of hell.
Emanuel SwedenborgThe angels taken collectively are called heaven, for they constitute heaven; and yet that which makes heaven in general and in particular is the Divine that goes forth from the Lord and flows into the angels and is received by them.
Emanuel Swedenborg