" But in reality we cannot compare joy with sorrow. Comparison is possible only by the very rapid alternation of two states of mind, and you cannot switch back and forth between the genuine feelings of joy and sorrow as you can shift your eyes between a cat and a dog. Sorrow can only be compared with the memory of joy, which is not at all the same thing as joy itself. "

― Alan W. Watts , The Wisdom of Insecurity: A Message for an Age of Anxiety