Even a book that is made up of only untruths can greatly improve us intellectually.

To leave a man's ego bigger, retweet him. To leave his faculty of reasoning better, challenge his tweet.

Sometimes the correct answer is neither ‘a’ nor ‘b’, but ‘a-b’.

If we had to earn our age by thinking for ourselves at least once a year, only a handful of people would reach adulthood.

The way most people use their minds is analogous to an ambulance that is used only as an umbrella.

Unfortunately, fools think that shouting makes their arguments convincing, or more convincing.

You cannot really convince a man who has always been blind that he does not see.

A man reaches the peak of irrationality just before, and that of rationality just after, an ejaculation.

We are sometimes reminded that we are not always rational, when someone spits as a response to a foul smell.