The goal of this thesis is to identify and to explain the main determinants of the Stoic ethics of Epictetus based on his work Discourse and Enchiridon as well as of the Stoic ethics of Marcus Aurelius based on his work Meditations. The basic idea of Epictetus is to achieve true bliss or eudaimonia which can be accomplished by restlessness, inner peace or ataraxia. In order to achieve this, we need to realize what is under our control, and what is not. One can not change one's own fate but one may change one's attitude towards the events by accepting misfortune and favorable occurrance calmly since one can not influence them. The cosmos is governed by divine laws that are immutable. Each person's mind is a fragment of God's mind. Suffering is the result of human's aspirations for material things and gratification of sensory pleasures. We can thus avoid suffering by devoting ourselves to the spiritual dimension of our being which is the only thing in our power. The ethical philosophy of Marcus Aurelius builds on Epictetus. His work Meditations has a form of a diary in which he summed up his own thoughts, which he as a philosopher devoted to himself as a remainder and guide on how to be a better person and emperor. He emphasized the importance of controlling our emotions and reactions to life events. Human nature is potentially corrupted because of ignorance of good and evil, so peace can be achieved by one's own mind and moral value. He believed that the purpose of life is to live in harmony with nature and that in every human being a fraction of divine essence may be found. For him everything is part of the divine plan, even evil, because the world is harmoniously and perfectly arranged, and everything else is a phenomenon which enters the cosmic order of things. Stoicism influenced and left its mark on Christianity, and also on renessaince. I will mention Justus Lipsius as one of the many renessaince philosophers who awoke stoicism with some new aspects in his work.