A million people can call the mountains a fiction, yet it need not trouble you as you stand atop them.

I think the really cool and compelling thing about math and physics is that it opens up entry to all these hypotheticals - or at least, it gives you the language to talk about them. But at the same time, if a scenario is completely disconnected from reality, it's not all that interesting.

I've always thought that one of the the great thing about physics is that you can add more digits to any number and see what happens and nobody can stop you.

It's tempting to just write a comic called 'Everyone Mail Randall Munroe Twenty Bucks' - maybe it would work, and I could just close down the 'xkcd' store and sit on a beach and draw pictures and make snarky Reddit posts for the rest of my life.

You don't become great by trying to be great. You become great by wanting to do something, and then doing it so hard that you become great in the process.

I learned very early on in life that not everyone wants to hear every fact in the world, even if you want to tell them everything you've ever read.

Google owns YouTube, and recently, I drew a comic about an idea for a YouTube feature - which they actually took seriously and implemented. So I'm thinking that maybe we'll have a future where Google is 'xkcd.'