Abramelin is a mystical text attributed to the 15th-century magician Abraham von Worms. It outlines a system of magic and spiritual development, focusing on the attainment of knowledge and communication with one's Holy Guardian Angel. The work emphasizes the importance of purification and preparation before engaging in magical practices. The Abramelin system is divided into three main sections: the first details the necessary preparations, the second describes the magical operations, and the third provides insights into the nature of the Holy Guardian Angel. This text has influenced various esoteric traditions, including Thelema and modern ceremonial magic.