The way to get what you want is to exercise good judgement. But often when we want something, we ignore good judgement. Because good judgement will tell us the truth. It will tell us to wait, or that what we want is wrong for us. We don’t want to hear that, so we choose not to listen.
What we need, and what we want, are often two different things. We usually know the difference, but we’re really good at fooling ourselves. It’s difficult to resist short-term gratification for long-term satisfaction.