Take a look at some of the world's greatest creators, Thomas Edison, Jesus Christ, Copernicus, The Buddha, Moses, Albert Einstein, Harriet Tubman. They all created without having had prior experience. Each had no previous evidence to prove their beliefs true. Faith is the common denominator in their beliefs becoming their reality. The level of one's conviction is the level of one's creation.
Conviction means that all doubts have been overcome.
Life is a choice for each and everyone of us. If you allow yourself to view yourself as someone whose experiences are creating his or her beliefs, you are living defensively spiraling your way backwards towards the past. You are powerless to change your reality. How, if you allow yourself to be someone whose beliefs are creating his or her experiences, then your living your life proactively. You are as powerful as you believe yourself to be.