Passion

We turn to some quotes to help touch on it:

He who's not busy being born is busy dying.
— Bob Dylan

Passion makes the world go round. Love just makes it a safer place.
— Ice T, The Ice Opinion, quoted in Reader's Digest, "Quotable Quotes," February 2002

Don't ask yourself what the world needs; ask yourself what makes you come alive. And then go and do that. Because what the world needs is people who have come alive.
— Harold Whitman

You always have to be bad at something you're passionate about.
— Personal advice from Bill Buxton

Persistence isn't using the same tactics over and over. That's just annoying. Persistence is having the same goal over and over.
— Seth Godin, March 14, 2008

Landing on your butt twenty thousand times is where great performance comes from.
— Geoff Colvin, from the chapter Where Does the Passion Come From? in his book, Talent Is Overrated.

Follow your passion, and success will follow you.
— Arthur Buddhold