You can't let praise or criticism get to you. John Wooden

You can't let praise or criticism get to you. It's a weakness to get caught up in either one.
- John Wooden

Conventional people are roused to fury by departure from convention, largely because they regard such departure as a criticism of themselves.
- Bertrand Russell

Criticism is prejudice made plausible.
- H. L. Mencken

Criticism is almost never constructive. Don't criticize others, and ignore it when you receive criticism.

Further reading: How to Stay Positive Around Negative People

To avoid criticism, do nothing, say nothing, and be nothing. - Elbert Hubbard

Ralph Waldo Emerson quote: Do not follow where the path may lead. Go instead where there is no path and leave a trail