People often think I'm a faker, but I'm usually honest, in a certain way--in such a way that often nobody believes me!

If you thought that science was certain - well, that is just an error on your part.

A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.

The highest forms of understanding we can achieve are laughter and human compassion.

Progress in science comes when experiments contradict theory.

So my antagonist said, "Is it impossible that there are flying saucers? Can you prove that it's impossible?" "No," I said, "I can't prove it's impossible. It's just very unlikely." At that he said, "You are very unscientific. If you can't prove it impossible then how can you say that it's unlikely?" But that is the way that is scientific. It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.

When you're thinking about something that you don't understand, you have a terrible, uncomfortable feeling called confusion... Now, is the confusion's because we're all some kind of apes that are kind of stupid working against this, trying to figure out [how] to put the two sticks together to reach the banana and we can't quite make it... So I always feel stupid. Once in a while, though, the sticks go together on me and I reach the banana.