Belzebuub is known for his extensive work in the field of spirituality. Mark, who wrote under the pen name Belzebuub, was born in the United Kingdom. From a young age, he showed a keen interest in spiritual subjects, creating his own esoteric ceremonies and reading spiritual literature.

His journey into spirituality took a significant turn in his late twenties when he encountered the Gnostic teachings of Samael Aun Weor and Rabolu. He quickly became a teacher within the Universal Christian Gnostic Movement in the UK, establishing study centers in multiple cities and countries.

In 1999, Belzebuub founded The Gnostic Movement in Australia, where he continued to teach existing Gnostic teachings and introduced his own. He was instrumental in creating popular online courses on self-knowledge, out-of-body experiences, dreams, and esoteric wisdom.

His written works include multiple courses and seven books on topics such as self-discovery, astral travel, and spiritual development. Belzebuub's work is characterized by practical exercises aimed at gaining spiritual knowledge, and he has never profited from his teachings.

In 2010, Belzebuub released his last book and has since remained out of public life. His courses and books continue to be influential in spiritual circles worldwide.