Doubt, the essential preliminary of all improvement and discovery, must accompany the stages of man's onward progress. The faculty of doubting and questioning, without which those of comparison and judgment would be useless, is itself a divine prerogative of the reason.
What I would say to the young men and women who are beset by hopelessness and doubt is that they should go and see what is being done on the ground to fight poverty, not like going to the zoo but to take action, to open their hearts and their consciences.
Never doubt that you can change history. You already have.
Without a doubt, professional boxers are the most exploited athletes in our Nation.
When in doubt or danger, run in circles, scream and shout.
There is no doubt that, with the exception of a very small number of people close to a vicious regime, the people of Iraq have been liberated and they understand that they've been liberated.
Almost the moment he died, they put him in Playboy as one of the greatest drummers, which he was - there's no doubt about it. There's never been anybody since. He's one of the greatest drummers that ever lived.
We know that, when it comes to technology and the economy, if you're not constantly moving forward, then - without a doubt - you're moving backwards.
I doubt whether classical education ever has been or can be successfully carried out without corporal punishment.
To walk through the ruined cities of Germany is to feel an actual doubt about the continuity of civilization.
I'm not going to doubt my life.
It takes a big idea to attract the attention of consumers and get them to buy your product. Unless your advertising contains a big idea, it will pass like a ship in the night. I doubt if more than one campaign in a hundred contains a big idea.
Yes, I will bring the understanding of a woman to the Court, but I doubt that alone will affect my decisions.
You know, my faith is one that admits some doubt.
If it wasn't for music, I doubt whether we'd be friends.