When people are least sure, they are often most dogmatic.
Obstinacy and dogmatism are the surest signs of stupidity. Is there anything more confident, resolute, disdainful, grave and serious than an ass?
If there is one class of person I have never quite trusted, it is a man who knows no doubt.
Though dissenters seem to question everything in sight, they are actually bundles of dusty answers and never conceived a new question. What offends us most in the literature of dissent is the lack of hesitation and wonder.
Only the madman is absolutely sure.
And the only people I fear are those who never have doubts... Save us all from arrogant men, and all the causes they're for.
There's something you do when you're completely confident that just can't be replicated when you know you're doing something wrong.
Always to be right, always to trample forward, and never to doubt, are not these the great qualities with which dullness takes the lead in the world?