I love to doubt as well as know.
The danger is not lest the soul should doubt whether there is any bread, but lest, by a lie, it should persuade itself that it is not hungry.
If the Sun and Moon should ever doubt, they’d immediately go out.
Doubt grows with knowledge.
I think that Hezbollah, no doubt that they work together with the Syrians.
Action and faith enslave thought, both of them in order not be troubled or inconvenienced by reflection, criticism, and doubt.
From this, without doubt, sprang the fable. Man created it thus, because it was not given him to see more than himself and nature, which surrounds him; but he created it true with a truth all its own.
There is little doubt that the majority of Mr. Mill’s supporters in 1865 did not know what his political opinions were, and that they voted for him simply on his reputation as a great thinker.
There is no doubt that the world economy is in trouble. But if governments or individuals use this as an excuse to reduce assistance to the world’s poorest people, they will only multiply the seriousness of the problem for the world as a whole.
Power runs with ideas that only the crazy would draw into doubt.