if you for a second – a half a second – don’t believe in what you’re doing whether it's your personal brand or the product you represent you need to get out now. We only get to play this game one time – one life."

those are lines leaved by some anonymous person in my comment box, what a sharps lines, so i digg into the internet and i found out those lines are part of the transcription of a presentation given by Gary Vaynerchuk at the Web 2.0 Expo in New York.

I found the site, so you can watch the video here