People are victims of their observation. One can achieve anything he wants, but first you need to realize your possibilities, and that is the problem.
Setting a goal is for many people the most failure part of their live. They do not see that there is opportunity to improve. Partly because they are blind, partly because they do not want to. Then they deserve their poor situation.
You have to constantly improve your goals, because the possibilities of everyone of us are higher with every new invention, every new day.
Man can achieve everything he wants, but he must not take it for any price.
Once you know what you want, you must take it with honesty. That is the only known way to keep it and to start building new higher level upon it.