The perfect line

I was looking for many years now, for that one line which would describe how mediocre folks try to tell the world that everything they do is the best and what everyone else does or aspires for is either stupid or not important or worse, materialistic. I used to try the fox and grapes and them being sour. But today I found the perfect line thanks to Sir Arthur Conan Doyle and it goes:

"Mediocrity knows none better than itself whereas talent instantly recognizes genius"

(One of his four novels, where one Scotland Yard agent unlike others who try to snub Holmes, actually respects him from the word go)

Well said sir, hats off!