What you want to happen is more likely to happen if you believe that it can happen.
Believing something can happen doesn’t make it happen, but doubting that it can, usually keeps people from even trying to make it happen. So you need to believe it can happen to have the confidence to try.
Believing it can happen is optimistic and others are more likely to try and help someone who’s optimistic get what they want.
Believing something can happen doesn’t magically make it happen, but believing what you want to happen can happen, is part of the formula to manifesting the things you want in life.
Believing it will happen is actually more powerful than believing it can happen. If you are going to openly express this though… you need to be confident, self-assured and thick-skinned.