positive thinking

I was going to buy a copy of The Power of Positive Thinking, and then I thought: What the hell good would that do?

- Ronnie Shakes (Notable Quotables Weekly, 6/23/05)

So certain are you

The whole problem with the world is that fools and fanatics are always
so certain of themselves, but wiser people so full of doubts.

- Bertrand Russell (NotableQuotables)