This collection includes books of the Teaching of Living Ethics from the fourth to the sixth: “Agni Yoga” (Riga, 1929), “Infinity. Part I” and “Infinity. Part II” (both Paris, 1930). Accepted and written down by Elena Ivanovna Roerich (1879–1955), the books of the Teachings of Living Ethics had a tremendous influence on the development of world spiritual culture and are classics of modern esoteric literature.