While working on the 1985 book “Habits of the Heart,” the late sociologist Robert N. Bellah met “Sheila,” who described her faith in words that researchers have quoted ever since.

“I can’t remember the last time I went to church,” she said. “My faith has carried me a long way. It’s Sheilaism. Just my own little voice.” The goal was to “love yourself and be gentle with yourself. … I think God would want us to take care of each other.”

A decade later, during the so-called “New Age” era, researchers described a similar faith approach with this mantra – “spiritual but not religious.”

Then in the 21st Century’s first decade, the Pew Research Center began charting a surge of religiously unaffiliated Americans, describing this cohort in a 2012 report with this newsy label – “nones.”