Aristotle maintained that women have fewer teeth than men; although he was twice married, it never occurred to him to verify this statement by examining his wives' mouths.
Beware of the man who works hard to learn something, learns it, and finds himself no wiser than before... He is full of murderous resentment of people who are ignorant without having come by their ignorance the hard way.
There are as many opinions as there are experts.
—Franklin D. Roosevelt
Competence, like truth, beauty and contact lenses, is in the eye of the beholder.
—Laurence J. Peter
All truths are easy to understand once they are discovered; the point is to discover them.
If the world should blow itself up, the last audible voice would be that of an expert saying it can't be done.
Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.
A superstition is a premature explanation that overstays its time.
Everything is vague to a degree you do not realize till you have tried to make it precise.
The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents.
—H. P. Lovecraft
I hate quotations. Tell me what you know.
—Ralph Waldo Emerson
No one who cannot rejoice in the discovery of his own mistakes deserves to be called a scholar.
An education isn't how much you have committed to memory, or even how much you know. It's being able to differentiate between what you do know and what you don't.
A fellow who is always declaring he's no fool usually has his suspicions.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.