Doubt is a good moment to start thinking with your heart and feeling with your head.

I'd rather live as an optimist with some doubt than a pessimist without hope.

Everything lasts forever, whether it stays with you or not.

If you know the right answers long enough people wont notice when you make up the ones you don't.

They had applied their doubts to the very head that had introduced doubt as a tool for advancing knowledge. And in the end they gave the head a nod.

There is no doubt in my heart that it was a three,