I've yet to meet anyone who hasn't....

.....at least heard of Christopher Columbus.  I don't know much about him - he was slightly before my time - but I do know that he was ridiculed for his belief.  Many even considered him mad.  
History is full of great tales about things that people once thought impossible but which turned out to be perfectly viable. It is, of course, also full of salutary tales involving unrealistic expectations.

But every so often in life, we all have to reach for our dreams - no matter how far-fetched other people consider them to be.

Sometimes all you have to do is forget what you feel and remember what you deserve.