Now he presents his "Problemata" (problems): "Abraham has gained a prescriptive right to be a great man, so that what he does is great and when another does the same thing it is a sin. (...) The ethical expression of what Abraham did is that he meant to murder Isaac, the religious expression is that he meant to sacrifice Isaac – but precisely in this contradiction is the anxiety that can make a person sleepless, and yet, without this anxiety Abraham is not who he is." He asked how a murderer can be revered as the father of faith.