Possibly the best 19 minutes you’ll ever spend.

Like a lot of people I was brought up believing that in order to be successful you had to be a charismatic extrovert. Until puberty I was—at least I think I was. An extrovert, certainly. Charisma… probably not. Though I made up for it by rushing around being very loud.

Now, I’d definitely say I’m an introvert. I like my own company and that of a few friends (and books, and writing). I can’t tell a joke—or pontificate to an audience—to save my life.

Like a light being turned on, Susan Cain’s ‘The Power of Introverts,’ a TED lecture, explains.