Published for the first time, this course of lectures, or conversations, as the author himself called them, was read in the 1986/1987 academic year at Tbilisi University. After lecture courses on Descartes, Kant, Proust, as well as on ancient and modern philosophy, this was actually the last, final course of M. K. Mamardashvili, devoted to the topic of thinking, discussing which, he sought to show his listeners, relying primarily on his life experience, how a person thinks and whether he is, in principle, able to think what he thinks with. When he cannot look at it from the outside, and therefore, use thought as a tool for pragmatic purposes. And that is precisely why, M. K. Mamardashvili believed, thought as such, when it becomes the subject of philosophizing, is not intended for anyone, no benefit can be derived from it. It is not for enlightenment unless the person himself has made personal efforts for this. That is, he did not at least once in his life distinguish the concept of thought from the thought itself, in which, as he put it, “you are absent, but it is there,” and therefore, your task, when it illuminated you, is to try to somehow hold on to it, to remain human.