The wind blows to and fro with incredibly amounts of energy, but there's no "try". The lion doesn't try to hunt. It simply hunts, and sometimes that results in a meal. It doesn't sit around wondering why it's such a failure as a lion. And it doesn't gather trinkets to prove how successful it is. In other words, it doesn't obsess about its own happiness.

Would you say Yoda believed in inaction? Do or do not. There is no try.

The "words of a miserable man" were his take on why he was miserable. My interpretation, in any event, is he was saying that all that effort and caring about success and worrying about what others thought... all of that made him miserable and he wished he hadn't bothered with any of that.

In other words, I didn't bring him up as an example to follow. I brought him up as a word of caution. "Try" too hard and you might become a miserable misanthrope obsessed with all your perceived failures.