Philosophy and existential psychology talk about cognition and understanding of man in his structure and experience as such, always affected in a relational prospect. A man and his existence before the world and life require the honest revision of existence. An author facilitates going near an existential prospect, showing the most meaningful authors and offering to interesting reflections for understanding human realities. Base book for the study of existential approach. Яки Андрес Мартинес Роблес author of reasons and books on existential philosophy, doctor of humanistic psychotherapy, founder and director "Circle of researches of existential therapy", honoured member-founder and secretary of the "Латиноамериканской association of existential psychotherapy", representative of Mexico and Latin America in "World confederation existential psychotherapists", a member of editorial committee of magazine is the "Existential analysis".