Family tradition, just like many others on here.
The thing is, Celtic led me to nearly everything else in my life that matters to me. My politics come from being a Celtic fan; I might still be a lefty and a trade unionist, but growing up in Glasgow as part of a community which was traditionally marginalised, ostracised, kept down gave me a real emotional connection with the underdogs in every walk of life.
Seeing that we didn't strong-arm our way to success, or bully people to get a foothold on the rungs of the social ladder, was also inspirational. Our people went completely the other way. We organised ourselves. We joined unions. We put a high premium on education. We got smart, we got connected, we used our strong arms to pull up those around us.
Actually, a screen-writer, William Monahan, put it better than I ever could, in his movie The Departed when he wrote "Twenty years after an Irishman couldn't get a f@@@ing job, we had the Presidency ... no-one gives it to you. You have to take it."
We've always had balls. We've always been smarter than the neanderthal knuckle draggers. You know why? Cause they believed all that "we are the Peepul" shite. They believed the world owed them something. We know you have to fight for every inch, and we're good at it.
That all came from being a Celtic fan, and the pride I get from where we are as a club and where we are as a support is enormous. We really are running the table now, the top table,