I like this article. It says a lot to me about being aware of what we attach our happiness to, and that these things can be disappointing if we don't attain or sustain them. Thus all those things have conditions, when the only thing we can rely on is being open in the moment... It doesn't say that we shouldn't go to those other places -- being human, we can't avoid them -- or that the challenge is to only be in enlightenment -- gosh, if that was the "goal" it would be just as problematic as trying to attain the other nine... but to just be aware of whatever is present.
Interesting. Lickerman implies by his choice that the world of "Learning" is best and describes it as, "Learning: The world of mastery. In this world, you feel a relentless drive to learn and accomplish something that creates value and meaning. The delusion comes when you think happiness comes only through accomplishment." That is similar to the definition of happiness that I use, "Happiness is that state of consciousness which proceeds from the achievement of one’s values." (Ayn Rand).