“The heart has its reason which reason does not know.”

“Who is also aware of the tremendous risk involved in faith – when he nevertheless makes the leap of faith – this [is] subjectivity … at its height.” – Søren Kierkegaard (1813 – 1855)
In a memorable scene from Indiana Jones and the Last Crusade, Indy deduced that the final step across his treacherous path was a leap of faith. And so it is in Kierkegaard’s [wiki] theory of stages of life.
The final stage, the religious stage, requires passionate, subjective belief rather than objective proof, in the paradoxical and the absurd. So, what’s the absurd? That which Christianity asks us to accept as true, that God became man born of a virgin, suffered, died and was resurrected.
Abraham was the ultimate “knight of faith” according to Kierkegaard. Without doubt there is no faith, and so in a state of “fear and trembling” Abraham was willing to break the universal moral law against murder by agreeing to kill his own son, Isaac. God rewarded Abraham’s faith by providing a ram in place of Isaac for the sacrifice. Faith has its rewards, but it isn’t rational. It’s beyond reason. As Blaise Pascal said, “The heart has its reason which reason does not know.”