The paper analyzes the principles of phenomenological philosophy, on the one hand, and the ideals of knowledge in Russian religious philosophy - on the other. In E. Husserl phenomenology, especially in his later works, such things as «life-world», «gabitualnost» and even «soul» become the main theme. On the other hand, in Russian religious philosophy, especially in sophiological doctrines, the problem of rational knowledge, its rigorous exposition of evidence and completeness converges with the classical discourse.