In the broadest definition, religion means a person’s own belief system, paradigms individually unique. That means that everybody has a religion, which suggests that there must be as many religions as there are people. How we use the word more commonly is to indicate something organized, something traditional, and something indicating belief in the supernatural. What would a world without religion be like?
On Being Spiritual
The development of spiritual virtues – loving all of life, even the hard parts; equanimity, compassion – may be entirely a matter of getting our neurons wired a certain way, but the circuitry of spirituality differs from the circuitry of cognition and emotion, though it draws on both.