THOSE WHO SAY IT CANNOT BE DONE
SHOULD NOT INTERRUPT THE PERSON DOING IT.
Show this quote to all the people in your life who say you can't do something - write a book, complete NaNo, lose weight, run a marathon, start a business, move to another country.
Show it to all those people who don't actually come out and say you can't do it but who obviously don't support you or encourage you or show any interest in this thing that is so important to you.
But most importantly, let's show this quote to ourselves, say it to ourselves, whenever we start to think we can't do it either. It has to start with us.