"Charlie realizes that it is difficult to find something that is really good. So, if you say 'No' ninety percent of the time, you're not missing much in the world."
This also reminded me of a couple of other quotes:
"The difference between successful people and really successful people is that really successful people say no to almost everything." –Warren Buffett
"Just give me a few decent things to do and I’ll ignore the rest of the world." –Charlie Munger