From Soren Kierkegaard’s journal entry for August 1, 1835:
I have vainly sought an anchor in the boundless sea of pleasure as well as in the depths of knowledge. I have felt the almost irresistible power with which one pleasure reaches a hand to the next; I have felt the counterfeit enthusiasm it is capable of producing. I have tasted the fruits of the tree of knowledge and time and again have delighted in their savoriness. But this joy was only in the moment of cognition and did not leave a deeper mark on me. It seems to me that I have not drunk from the cup of wisdom but have fallen into it.
One must first learn to know oneself before knowing anything else. Not until a person has inwardly understood himself and then sees the course he is to take does his life gain peace and meaning; only then is he free of that irksome, sinister traveling companion – that irony of life that manifests itself in the sphere of knowledge and invites true knowing to begin with a not-knowing (Socrates), just as God created the world from nothing.