You must have heard a lot being said about the power of positive thinking.
Even the very famous Law of Attraction which has been immortalized in the book The Secret speaks about the power of optimism.
The law goes as far as to say that if you think positively about something with complete devotion, then even nature changes its plans to make it happen for you.
That may be well be true because if you have a very positive thought about something, you are going to consciously or subconsciously take some actions in order to fulfill it.
You may not even know that you are doing something for your wish fulfillment. And, when you are planning things in a particular direction, things begin to take the shape you want.