Born Elisabeth Feraille, in a middle class family in the Belgian Ardennes, Elisabeth's education was the one of the young girls of her time. She married in May 1936, Jean Warnon, a graduated from the Antwerp University with a Law degree in Commercial, Consular, and Maritme Law. Jean Warnon was killed in action in May of 1940, during the Battle of the Lys, when the Belgian Army retarded the Nazi invasion for three weeks, against all odds, long enough for the British to save their Army at Dunkerk.

As a young widdow, Elisabeth began to work in the underground network named the Ligne Comète with the purpose to help allied pilots to return safely to England, after having their planes shot down by the Germans above the Belgian territory. She was arrested in 1942, and sentenced to death by a tribunal of the Luftwaffe. Her sentence was commuted to life emprisonment by intervention of Queen Elisabeth of Belgium. She was then deported to Concentration Camps, begin of 1943.

She survived the Ravensbrück and Mauthausen extermination camps, and after long recovery, she was invited to work for the Belgian secret service, of which she became an Officer. After a few years, she met several people who introduced her to Theosophy. She became a member of the Theosophical Society late 1948, and was later initiated in co-Masonry, and Martinism. After an eight year residence in India, where she followed the teachings of a Hindu Master (in the same Ashram as Mrs Blavatsky, and other members of the Theosophical Society) , to learn to control her natural clairvoyance gift, she returned to Belgium to pursue her carrier as a writer.

As from 1968 and until the end or her physical existence, she devoted her time mainly to the Ordre de la Mère du Monde [Order of the World Mother], an organization reserved to women, she had founded. She was also responsible for the expansion in France, of the Ordre Martiniste des Pays-Bas, in which she was an Officer of the Supreme Council.

She wrote a number of books on Mysticism and Spirituality, which are still popular in France, Belgium, and French speaking Canada. The English translation of one of her books Immanence and Transcendance, was published in 2001.