"Any fool can criticize, complain, and condemn--and most fools do. But it takes character and self-control to be understanding and forgiving."

"The trouble with most of us is that we would rather be ruined by praise than saved by criticism." 

"The critic has to educate the public; the artist has to educate the critic."

"The final proof of greatness lies in being able to endure criticism without resentment."

"Criticism may not be agreeable, but it is necessary. It fulfills the same function as pain in the human body. It calls attention to an unhealthy state of things."

"Criticism, like rain, should be gentle enough to nourish a man's growth without destroying his roots."

"The dread of criticism is the death of genius."

"If you have no will to change it, you have no right to criticize it."