Its never easy to be frustrated. Frustrated about knowing something will work and not having the numbers or the facts to prove it. How do you keep on trying knowing in your guts that something will work and wishing that sheer will can make it happen? How do you keep on working towards that goal, knowing it may all be for naught that it might be a dead end but also knowing that should you succeed, you can improve people's lives economically and that its multiplier effect would be a better life for their families? More importantly, how can you stay the course and not be caught up in delusions of grandeur?

I guess, the answer is, nobody knows. You just keep on forging ahead in spite of knowing that it may all be only crap.