Kierkegaard tried to make Christianity relevant again by making being a Christian harder. For Kierkegaard (1815–1855), freedom resulted from the crisis of intellectual, emotional, and physical imprisonment. In Fear and Trembling, Kierkegaard provided the example of Abraham, who was willing for his faith to sacrifice his only son Isaac. This created an existential crisis which demanded action and change because without a crisis, life becomes too easy with the deepest issues of existence easily ignored. Abraham passed the existential crisis of faith not because of dogmatic beliefs, but because of his faithful relationship with God.