If you think you can do it, then you really can.
If you keep coming up with questions, then you'll keep coming up with even more questions.
If you think negative thoughts, then negative actions and outcome will happen.
If you expect bad things to happen, then it will.
Granted, not every thought that comes to mind means it's true or it's real. Sometimes, fears plague us like crazy. But it all starts with the mind. That's why you gotta be careful what you think. It just might come true.