This paper deals with life and philosophy of Søren Kierkegaard. His life is viewed with a focus on people who had influenced the development of both his character and philosphy, in particular Kierkegaard's father and fiancée. Kierkegaard deemed that Christianity had determined his life since his early age. In his opinion, the Church in Danemark had distanced itself from real Christianity and it did not follow the original teaching of Christ. According to him, one can become a Christian only as an individual and not as a member of a group. Being a Christian does not mean having a confirmation of baptism, but Christianity should be lived by its original principles. For Kierkegaard, scandal is an essential marker of Christianity. Jesus was taunting his compatriots, so, according to Kierkegaad, a Christian should also taunt his contemporaries. Kierkegaard's philosophy conflicts with Hegel's philosophy, in context of three problems that Kierkegaard puts forward against Hegel's ethics in his work „Fear and Trembling“. Likewise, the paper deals with Kierkegaard's three stages of existence, which according to him are aesthetic, ethical and religious ones. The aesthetic is the lowest stage because the person who lives aesthetically has no relationship with himself and therefore cannot despair, which is important for Kierkegaard. Aesthetics exists only in relation to external things. The ethical stage is a higher stage because an ethical person is in conflict with the world. The ethical stage is a struggle. The last and highest stage is the religious stage. In this stage, man is in a relationship with God.