To have doubted one's own first principles is the mark of a civilized man.

To have doubted one's own first principles is the mark of a civilized man.

Any belief worth having must survive doubt

Any belief worth having must survive doubt

When in doubt, win the trick.

When in doubt, win the trick.

I respect faith, but doubt is what gets you an education.

I respect faith, but doubt is what gets you an education.

To have doubted one's own first principles, is the mark of a civilized man.

To have doubted one's own first principles, is the mark of a civilized man.

When you doubt, abstain.

When you doubt, abstain.

But the gods are dead--
Ay, Zeus is dead, and all the gods but Doubt,
And doubt read more

But the gods are dead--
Ay, Zeus is dead, and all the gods but Doubt,
And doubt is brother devil to Despair!

When in doubt, don't.

When in doubt, don't.

If I am fool, it is, at least, a doubting one; and I envy no one the certainty of his read more

If I am fool, it is, at least, a doubting one; and I envy no one the certainty of his self-approved wisdom.