Johannes Cassian is one of the most important figures at the transition from Eastern spirituality of the early West to the Western world. Today, Cassian represents a self-responsible spiritual life in freedom, entirely without constraining authoritative institutions and without fear of judgment from others. Gabriele Ziegler explains Cassian's insights for today's time. Cassian's writings reveal how we can live straightforwardly in inner freedom, free from constraints, negative suggestions, or dependencies. They provide examples of how we can shed old habits, let go of the rush for possessions, and, enduring the emptiness, find peace. Ultimately, they make visible the reasons why humans struggle to follow God's good commandments and show how we can deal with failures, mistakes, sins, and crises. Thus, we can become free for what is essential: God in our own lives.