generally speaking , when someone doubts a truly realistic possibility for an expectation for success that you feel justifies hope , the doubters either dont understand the subject matter ( of your hopes and/or dreams ) well enough to see how it could work , or they dont know ( or believe in ) god and his miracles very well or worse they dont want you to succeed because if you succeed in reaching your dreams then they may no longer have a justifiable excuse for their own mediocrity .