Any truth is better than indefinite doubt.
When in doubt, don’t.
If the Sun and Moon should ever doubt, they’d immediately go out.
Test yourself on mankind. It is something that makes the doubter doubt, the believer believe.
And new Philosophy calls all in doubt, the element of fire is quite put out; the Sun is lost, and the earth, and no mans wit can well direct him where to look for it.
There is no doubt that life is given us, not to be enjoyed, but to be overcome-to be got over.
I show you doubt, to prove that faith exists.
Doubt is the father of invention.
A conservative is someone who makes no changes and consults his grandmother when in doubt.