Wise parents offer criticism only when asked, and then minimally

Wise teachers impart their knowledge; inept ones impose theirs

Wise teachers create an environment that encourages students to teach themselves

I've been all over the world and I've never seen a statue of a critic.

I think Gore was over-reacting in some ways to the criticism that Clinton hadn't pushed hard enough.

You get to the stage where every little bit of criticism that comes to you, you use to make you stronger, ... We get it from a lot of angles now and we hope to answer it by success.