Peter Konstantinov Deunov was born on July 11, 1864 (St. Peter's Day), in the village of Hadurcha (presently Nikolaevka), 30 km away from Varna, at noon. He was the third child of Dobra Chorbadzhi Atanasova and Konstantin Deunovski, the local pastor. He had an elder brother called Atanas and an elder sister called Maria.

In 1872, Peter Deunov entered the Hadurcha Bulgarian Elementary school, which was closed during the Russian-Turkish Liberation War of 1877-1878.

After Bulgaria was set free from the Ottoman empire, he graduated from the Men's Grammar School in Varna.

On July 25, 1886, he graduated from the American School of Theology and Science in Svishtov, on the Danube.

For two years Deunov was a teacher in the elementary school of Hotantsa, a village in Northern Bulgaria, in the district of Rousse.

In August 1888, Peter Deunov went to the United States.

There, he first enrolled in the preparatory seminar in theology at the Faculty of Madison, New Jersey, which he finished on October 15, 1890.

From 1891 to 1893, he was a student with the Theology department of Boston University. He obtained his diploma from Boston University on June 7, 1893.

On February 3, 1894, Peter Deunov completed a one-year course of medicine.

In 1895, at the age of thirty-one, Peter Deunov returned to Bulgaria. Until 1899, he lived in seclusion in Varna conducting assiduous spiritual work. His only companion during these years was his sister Maria.

During his sojourn in the United States, Peter Deunov formally prepared himself for his spiritual mission by attending the annual meetings of the Great Initiated. He also met with the Rosicrucians, whom he later proclaimed a branch of the Universal Brotherhood of Light. In the remote past, the latter had been represented by the Bogomili movement in Bulgaria.

In 1896, Peter Deunov published the book "Science and Education" in Varna. In this book he outlined the human Path in the World Drama in rational terms and laid out the foundation of the New Culture following into the next century.

On March 7, 1897 (according to the Julian Calendar), The Spirit of God descended onto Peter Deunov while he was staying in Tetovo, a village in the region of Rousse. He was thirty-three at that time. By this act, the individual Peter Deunov was converted into The Brotherhood of Light Master Beinsa Douno.

This same year, he published in Varna the brochure "Hio-Eli-Meli-Messail". That was the Third Testament Word for Those Anointed by God.

The next year, Beinsa Douno delivered a lecture entitled "Call to My People, Bulgarian Sons of the Slavonic Family" before a congregation of the charitable society "Mother". This lecture was a call for social and spiritual self-determination.

In 1898, he started corresponding with his first followers, Penyo Kirov from Bourgas, Dr. Georgi Mirkovich from Sliven and Maria Kazakova from Veliko Turnovo.

On February 13, 1899 (according to the Julian Calendar), Beinsa Douno wrote The Ten Testimonials of God in Varna, and on February 24, 1899, he wrote The Promise of God. On February 28, 1899, he signed the Answers to The Ten Testimonials in Bourgas along with his disciples Penyo Kirov and Todor Stoimenov.

In 1899 and 1900, Beinsa Douno used to live with father Konstantin Deunovski in the town of Novi Pazar. On April 7, 1900 (according to the Julian calendar), he summoned the first meeting of the Brotherhood of Light in Varna and named it "The Meeting of The Chain." Among the attendees were Penyo Kirov and Todor Stoimenov from Bourgas and Dr. Georgi Mirkovich from Sliven.

From 1900 to 1942, Beinsa Douno summoned the annual meetings of the Brotherhood of Light every August. The meetings were held in different places: Varna (1900 to 1908), Veliko Turnovo (1909 to 1925), and Rila or Vitosha mountain near Sofia (1926 to 1941).

From June 25 to July 9, 1900 (according to the Julian calendar), in Novi Pazar, Beinsa Douno wrote The Seven Conversations with The Spirit of God.

On October 1, 1900 (according to the Julian calendar), he wrote another Conversation with The Spirit of God, entitled The Three Things.

From 1901 to 1912, Master Beinsa Douno traveled across Bulgaria delivering lectures and carrying out phrenological studies on selected representatives of the Bulgarian people.

Since 1904, he used to stay for long periods in Sofia, in the house of Petko Goumnerov, on 66 Opaltchenska Street. There, The Master began to disseminate his Word in public.

In 1912, he worked over the Bible in Arbanasi, near Veliko Turnovo. As a result, The Master compiled The Testament of the Colored Light Rays which was published in September. The motto on the title page read: "I will always be a devoted servant of Jesus Christ, Son of God. Turnovo, August 15, 1912."

On March 9, 1914 (according to the Julian calendar), The Master organized a worship where he proclaimed the advent of the New Era of the Aquarius.

On March 16, 1914 (according to the Julian calendar), Master Beinsa Douno gave his first Sunday lecture in Sofia. Entitled "Behold, the Man", this lecture opened the series "Power and Life" in which The Master defined the basic principles of the Brotherhood of Light New Enlightenment.

On February 15, 1917, Tuesday, The Master opened another series of lectures for married women which he continued until June 30, 1932.

In 1917 and 1918, during the regime of Vassil Radoslavov, The Master was exiled in Varna, where he maintained correspondence with his disciples from his room in the London Hotel.

On August 19, 1920, the annual meeting of the Brotherhood of Light opened in Veliko Turnovo.

On February 24, 1922, The Master inaugurated The White Brotherhood School. Initially, two courses were taught in the Spiritual School – before the General and the Special (Youth) Occult Course. The General Occult Course started with the Master's lecture "The Three Lives", while the Special (Youth) Course started with the Master's lecture "The Two Paths". From that day on, conferences were held every week for 22 years (until December 1944).

On August 21, 1922, at the White Brotherhood meeting in Veliko Turnovo, Master Beinsa Douno presented the song "Fir-Fur-Fen - Bless". That song launched the school music exercises tradition that wound up in 1944 with "The New Genesis".

Starting in 1923, The Master propounded explanations of the different aspects of his Word in a specially built hall in Sofia, at 14 Oborishte Street. In 1927, The Master founded the village (ashram) Izgreva (The Sunrise), in the outskirts of Sofia. He established himself in Izgreva where, in a specially built hall, he lectured on the different aspects of his Word. In Izgreva, The Master assembled his followers and disciples in order to center the School work on the physical level.

On August 19, 1927, at a meeting of the White Brotherhood in Izgreva he delivered a series of lectures proclaiming solemnly the Path of the Disciple.

In 1929, The Master opened The School in the Rila mountain, at the site of the most ancient occult school on Earth.

On September 21, 1930, he initiated a new aspect of his Word: the Sunday morning speeches that continued until April, 1944.

In 1934, The Master presented the Paneurhythmy - a cycle of twenty-eight exercises, consisting of melody, text and body movements. Later, he added to them the exercises "Sunbeams" and "Pentagram".

On May 4, 1936, a card-carrying member of the Party of the Democratic Accord battered The Master who sustained a brain hemorrhage causing a paralysis. Despite his illness, on July 14, 1936, he went camping near the Seven Rila lakes along with his disciples and recovered fully on August 12.

On March 22, 1939, he wrote an epistle to his disciples known as "The Eternal Testament of Spirit".

At the beginning of 1944, while the Allies bombarded Sofia, The Master organized the evacuation of Izgreva to the village of Murchaevo, 24 km south-west of Sofia. There, he stayed in his disciple Temelko Gyorev's house (presently a museum). He returned to Izgreva on October 19, 1944.

On December 20, 1944, The Master pronounced his Last Speech to the General Occult Course.

On December 27, 1944, Master Beinsa Douno retired from the physical world. His body was buried in Izgreva.