This volume brings together the religious and philosophical writings of the founders of Russian religious philosophy, Aleksei Khomiakov and Ivan Kireevsky. Both began their intellectual careers in the literary world of the 1820s. The texts collected here make the philosophical concepts of Sobornost (community, universality, wholeness, ecumenicity) and integral knowledge, available to western readers. Based on the primacy of the heart, the spiritual wholeness of the human being and the cognitive will, integral knowing moves beyond rationality to union with the object of knowledge in knowing. This book provides an introduction to Russian religious philosophy, and a profound, meditative text for anyone concerned with human and spiritual unity. Also included are two responses to Slavophile ideas by the prominent Russian philosophers Pavel Florensky and Nikolai Berdiaev.