This introduction provides a brief overview of L. Tengeli's life path and philosophy. The author identifies three main questions of his philosophy, which are the question of life-history, the question of experience and the question of the phenomenological metaphysics. According to the central thesis of the introduction, Tengeli is the characteristic representative of modern phenomenology, because in his philosophy we find all those distinctive features which are peculiar to phenomenology in the 21st century: problem of transcendentalism, problem of phenomenological metaphysics, and productive address to history of philosophy.