Discussions of religion are typically about God. Atheists reject religion because they don’t believe in God; Jews, Christians and Muslims take belief in God as fundamental to their religious commitment. The philosopher John Gray, however, has recently been arguing that belief in God should have little or nothing to do with religion. He points out that in many cases — for instance, “polytheism, Hinduism and Buddhism, Daoism and Shinto, many strands of Judaism and some Christian and Muslim traditions” — belief is of little or no importance. Rather, “practice — ritual, meditation, a way of life — is what counts.” He goes on to say that “it’s only religious fundamentalists and ignorant rationalists who think the myths we live by are literal truths” and that “what we believe doesn’t in the end matter very much. What matters is how we live.”

It is misleading — and dangerous — to think that religions are different paths to the same wisdom.

At least since the first petals of the counterculture bloomed across Europe and the United States in the 1960s, it has been fashionable to affirm that all religions are beautiful and all are true. This claim, which reaches back to “All Religions Are One” (1795) by the English poet, printmaker, and prophet William Blake, is as odd as it is intriguing. No one argues that different economic systems or political regimes are one and the same. Capitalism and socialism are so self-evidently at odds that their differences hardly bear mentioning. The same goes for democracy and monarchy. Yet scholars continue to claim that religious rivals such as Hinduism and Islam, Judaism and Christianity are, by some miracle of the imagination, both essentially the same and basically good.

This view resounds in the echo chamber of popular culture, not least on the “Oprah Winfrey Show” and in Elizabeth Gilber