All I’m coming up with is “Unknown.” Does anyone know who originally said it?
No, but it might have something to do with chakras.
There’s four physical chakras and two spiritual ones. (head, navel) At least in some systems. (there’s variation between five and seven chakras)
Probably a Advertising/Marketing Director for Harley Davidson…
I like the chakras thing, but I’m just cynical enough to buy the marketing theory! 
Definately sounds like a marketing line from a motorcycle company.
BMW cycles used to drop them often in their brochures. e.g. “What is behind me does not matter.”