When trying to achieve something, never project a figure. This projecting brings about 2 problems, (1) You will become despondent and very soon fall into a depression, and (2) Out of frustration you will begin to fight with everyone. The state of the mind should rather be: “I will work and then be happy with whatever I receive. If I don’t receive enough, tomorrow is another day. I will try again.” In this way you will remain happy as well as those around you. But when you project too much then initially you hurt yourself. And with time you want that hurt to fall on others as well. You then get gripped with jealousy and begin to run others down etc.
Source: Al-Haadi