Chapter 1: A Project of Thought  in  Philosophical Fragments

Book Chapter by Sören Kierkegaard

If a human being is originally able to understand the Truth, he thinks that God exists in and with his own existence. But if he is in error he must comprehend this fact in his thinking, and recollection will not be able to help him further than to think that, whether he is to advance beyond this point, the Moment must decide.

Chapter 1: Despair is Sin  in  The Sickness Unto Death

Book Chapter by Sören Kierkegaard

Sin means to be in despair at not willing to be oneself, or to be in despair at willing to be oneself. The lives of most men, being determined by a dialectic of indifference, are so remote from the good (that is, faith) that they are almost too spiritless to be called sinners, almost too spiritless to be called despairers.