Sometimes, we get really emotional about the things that we want. We put too much emotions into our pursuit for that particular thing, and eventually we become desperate. Sometimes we don't even realise. Our desperation then pushes away what we want to get.
Desperation is generally negative, because when we're desperate we think like "I really want to get ___! Why can't i get ___??". Thus, we become weak and sensitive over whatever it is that we want. And we lose our control over it. It's just like not being in control when we're angry, just that our emotions are not as intense, but last for a longer time.
Instead of being too emotional about what we want, we should learn to let go. It's not that we should stop pursuing what we want. It's that we should give our all, yet be relaxed enough to know that we can still live without what we want. It's that we should be relaxed enough, yet believe firmly that we can get what we want, without too much emotions involved.
In my opinion, sometimes desperation is caused by fear. We are afraid that we cannot get what we want, or we are afraid that we're getting it too slowly. I am definitely guilty of it, that's why i'm writing this blog post (many of my posts are dedicated to myself as well as people who need them). We have to be confident and sure that we can get what we want, and positive thinking is once again the key.