It's a funny thing about looking for things. If you hunt for a needle in a haystack you don't find it. If you don't give a darn whether you ever see the needle or not it runs into you the first time you lean against the stack.
The quote highlights the irony of searching for something you want too desperately. It suggests that when you actively pursue an elusive goal, like finding a needle hidden in a haystack, you often come up empty-handed. This reflects the idea that overexerting oneself can lead to frustration and failure.
Conversely, the quote illustrates that when you adopt a more relaxed attitude and stop obsessing over a desired outcome, you may unexpectedly encounter it. This perspective encourages a sense of letting go and openness to possibilities, suggesting that sometimes the best approach is to not strain too hard in pursuit of what we want.