What Religion Would You Believe?

A friend mentioned the sort of Zen that would be his religion... if he had one.

I don't think it was a religion he was brought up in, and left. That would be a different category. For me, of course, that religion-of-origin would be Catholic.

I might like to be a Druid,
And wear an air of mystery.
Their beliefs appear quite fluid,
And mostly lost to history.