My further reading links included my "Spirituality Redefined," which starts out distinguishing religion and spirituality through the words of several Medium writers, including this quote from a Keith Hill:

"Being religious involves having faith in God (however named and defined) and signing up to a basic set of beliefs — technically a credo — that define what a worshipper needs to accept to become a member of that religious community. In contrast, being spiritual is experientially focused, with seekers and worshippers preferring to ground their spiritual outlook in personal experience, and to express using a range of sacred world texts, rather than by referring to a credo drawn from a single holy scripture,"

and includes one of my many favorite quotes from Neale Donald Walsch's "Conversations with God."

"Religion cannot stand Spirituality. It cannot abide it. For Spirituality may bring you to a different conclusion than a particular religion — and this no known religion can tolerate. Religion encourages you to explore the thoughts of others and accept them as your own. Spirituality invites you to toss away the thoughts of others and come up with your own."

There are some very choice words in "One" about religion too.