“There is a deeper joy in emptying ourselves.”

Academy of Achievement interview (2006)
Context: In our culture, we think that happy and color is trivial, that black and darkness is deeper. But Nietzsche said — which is a line that I firmly believe — "Joy is deeper than sorrow, for all joy seeks eternity." And if you see Grendel, you'll see, as he's on the edge of the abyss, ready to leap to his death, he sings, "Is it joy I feel? Is it joy I feel?" And it's so, so moving. You can have a lot of different explanations for the ending of that opera, but there is something so palpable that you will feel when he sings those lines.

Joy: Share it! p. 100
Joy: Share it! (2018)

The summary of the Joy In The Merely Real sequence (October 2009) http://wiki.lesswrong.com/wiki/Joy_in_the_Merely_Real
Context: If dragons were common, and you could look at one in the zoo — but zebras were a rare legendary creature that had finally been decided to be mythical — then there's a certain sort of person who would ignore dragons, who would never bother to look at dragons, and chase after rumors of zebras. The grass is always greener on the other side of reality. Which is rather setting ourselves up for eternal disappointment, eh? If we cannot take joy in the merely real, our lives shall be empty indeed.

2014

Source: City

Don Soderquist “ Live Learn Lead to Make a Difference https://books.google.com/books?id=s0q7mZf9oDkC&lpg=pg=PP1&dq=Don%20Soderquist&pg=PP1#v=onepage&q&f=false, Thomas Nelson, April 2006 p. 61.
On Choosing to be Joyful

St. 5
Dejection: An Ode (1802)