In the article, the problem of the religious nature of the existential philosophy of N. A. Berdyaev is considered. It is shown that his understanding of his own philosophy as the existence of the spirit affected the way he understood the issue of freedom. For a philosopher, freedom is a state of mind, and therefore, the problem analyzed is not political and not legal, but exclusively religious. While dealing with this task, the philosopher makes an attempt to replace the usual philosophical terminology with a religious-existential one for a more complete reflection of freedom.