Cult - a relatively small group of people that have been meeting regularly for a generation or more. Their belief system and rituals seem strange, or even ridiculous, to those not in the group. Members tend to lose their ability to think for themselves, and they’re ostracized by friends and family if they dare to leave the group.
Religion - a relatively large group of people that have been meeting regularly for a century or more. Their belief system and rituals seem strange, or even ridiculous, to those not in the group. Members tend to lose their ability to think for themselves, and they’re ostracized by friends and family if they dare to leave the group.