This book presents the teaching of Evagrius of Pontus (345-399) about eight passionate thoughts (logismoi), i.e. gluttony, impurity, avarice (greed), sadness, anger (wrath), acedia, vanity and pride. The study first reconstructs cosmology, eschatology, anthropology and spiritual teaching of the monk of Pontus in order to show the nature, dynamics and ways of combating against the eight passionate thoughts as proposed by Evagrius. His teaching in this regard became the basis for later Christian teaching on the Seven Deadly Sins and an inspiration in the future for some currents of modern psychology.