Your assumptions are your windows on the world. Scrub them off every once in a while, or the light won't come in.

The strength of one's opinion should not exceed their knowledge on the matter.

One’s opinion should only be as strong as one’s knowledge on the matter.

Pride is a fallacy. None of us are greater than the sum of our parts.

When my information changes, I alter my conclusions. What do you do, sir?

The thing is, it's very dangerous to have a fixed idea. A person with a fixed idea will always find some way of convincing himself in the end that he is right