EN
Theory of self-cognition in Thomas Aquinas’ account is frequently presented as a reflexio theory, which describes intellectual move toward intellect’s own cognitive acts. The object of such a self-knowledge is intellect itself and in result “self” is identified with knower. However, reflexio theory is only part of doctrine of self-cognition in Aquinas’ philosophy. Inasmuch as soul is able to cognize its intellectual acts, it is also able to know its activities and associated ends and desires. Therefore, the aim of the article is to present the concept of self-cognition in the practical dimension. The main thesis of the article is the claim that self-knowledge is the necessary condition of free and rational human activities.