As Cofty says, bullocks.
The quote you are so fond of SBF is similar to one used frequently by the fundie preacher Billy Graham. If you try to take a middle of the roach approach to god you will get run over from both directions. Other fundies have opined something similar - those who don't believe in anything will fall for everything.
Utter bullocks and x-tian spin and nonsense at its worst. The rationals follow the evidence, without prejudice or emotion. That isn't believing in 'anything'; that isn't even belief. The only thing required to believe is to feel.
Whistling through the graveyard is Mr. Stark. Religion is dying a much deserved, slow painful death. Without a doubt it will re-born like a Phoenix into something our planet and species can tolerate. A lot of humans will seek out religion for generations, because we are a pathetic species. Religion is the single most barrier in the way of the evolution of our species. The sooner it can be vanquished, and the 'need' for it removed, the better we will be as a species.
And really, he wants to place ANY relevance to the word spiritual? Really, SBF? That word means anything and everything. I would use the word to describe many of the travels and excellent adventures I've been on the past 2 decades. I would use it to define my friendships and the relationships with my kids. I use it frequently to describe my GF's ass.
None of those things have anything to do with religion or god. Hanging his hat on the relevance of that word is more whistling whilst walking by Mr. Stark. Through the graveyard.