Forel made reference to Religion of Social Good in another article, The World Vision of a Savant, in which he explained that on completing it in March 1919 he added the words "Scientific Religion". He further explained that on coming across the Bahá’í Movement at the home of his son-in-law and writing a letter to ʻAbdu'l-Bahá soon afterwards, he withdrew his Scientific Religion of Social Good as being unnecessary given what he had discovered in the Bahá’í teachings. In a Codicil which Forel added to his will in August 1921, and which was included by the editor in his memoir, Out of My Life and Work, he stated that in 1920, at Karlsruhe, he first made acquaintance with the "supraconfessional world- religion of the Bahá’í —", also expressing an ardent wish that the Bahá’í religion would "live and prosper for the good of mankind". Correspondence with ‘Abdu’l-Bahá. On December 28, 1920, Forel sent a letter to ‘Abdu’l-Bahá, giving a description of his beliefs, information concerning Bahá’í literature he had read, and expressing his amazement at ‘Abdu’l-Bahá’s clarity of vision. He explained that at the age of 72 he was still thrilled by "the truths of science", having written extensively on the behaviour of ants, the anatomy of the brain and other scientific subjects, and went on to explain that he was a monist, believing that the function of the brain and mind “or soul“ are inseparable. It was for this reason, he wrote, that he was unable to believe that the soul survives after death. He also pointed out that he was completely agnostic, “like the philosopher Socrates or the great naturalist Darwin“, and finished his letter by asking if, given his agnosticism, he could belong to the Bahá’í Faith. Forel didn't wait for ‘Abdu’l-Bahá’s response before deciding that his beliefs were in accordance with becoming a member of the Bahá’í Faith, and according to a letter which he wrote to the editor of the Bahá’í magazine Sonne de Wahrheit, his decision was influenced by an article printed in the same magazine in March 1921, using a transcript of conversations which had taken place between ‘Abdu’l-Bahá and Dr. J. Fallscheer [Josephina Theresia Zürcher]. The article in question concerned the story of creation as recorded in Genesis in relation to Darwin's theory of evolution, stating that creation was a “progressive process“, and that the theories of Darwin and the monists, rather