The main concern of both Berdjaev's and Bulgakov's philosophical strivings consists in developing a concept of the person as the foundation of human dignity and creativity within a Christian worldview. Once attracted by Marxism with its emphasis on human dignity and social justice, they started to struggle against Marxism's atheist materialism because of its lack of a concept of person. However, the same concern will lead both thinkers down very different paths with different consequences. This paper argues that, even though Berdjaev has become famous as a philosopher of the person and a herald of creative ethics, Bulgakov developed a more solid Christian justification of the same claims. Both systems are presented by means of comparing some crucial notions within their concepts of personality—potentiality, trinity and autonomy.