The serious problems of life are never fully solved. If they should appear that they are, this is the sign that something has been lost. The meaning and design of a problem seem not to lie in its solution, but in our working at it incessantly. This alone preserves us from stultification and putrefaction.
~ Carl Jung, "The Stages of Life" essay
quoted in The Myth of the Great Ending by Joseph M. Felser
