The situation in which human society finds itself today breathes relativism, and the ‘old’ Christian values are being forgotten. Neglecting Christianity means neglecting both it’s teachings and doctrines. The same goes for eschatological questions which are today especially despised and which are called old, mythical and regressive. However, being that not one man is a mere mortal, but an eternal creature, these questions are of great value. C. S. Lewis in his various works often spoke about God, whether implicitly or explicitly, and about the relationship a man has with God along with all the possibilities which a man can choose in his life. On one hand, a man can choose living in a relationship with God – in peace, happiness and wholesome fulfillment of his desires. On the other hand, he can choose the curse of being alone and of being self contained. In the end, a man’s life path is purely the choice between those two things, without any alternatives or a middle way. A man’s destiny does not recognise the principle virtus in medio. This essay wants to show the vision of eschatological realities of purgatory, hell and heaven as seen by the brilliant Oxford professor C. S. Lewis. We consulted, almost exclusively, his works with the intention to read and share his thoughts about the aforementioned themes. Lewis endeavoured to share the ancient Christian teachings in a new and fresh way, and we consider it very important to share his noble and creative efforts regarding that.