Take a look at this web page that lists quotes supposedly spoken by John.
Some are definitely real quotes, and some are song lyrics, but others just seem obviously NOT to be him. But there's one in particular, the very last one, that seems to be all over the Internet attributed to John:
"When you do something noble and beautiful and nobody noticed, do not be sad. For the sun every morning is a beautiful spectacle and yet most of the audience still sleeps."
Does anyone know where this comes from? To me, this doesn't sound like John in the least, but people have posted it over and over again. I can't find it being attributed to anyone else, but it sounds more like something the Dalai Lama, or even Yoko, would say, or even a Hallmark card!