People
Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.
— Karl Marx

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This passage describes religion as comfort for suffering people: a sigh from the oppressed, warmth in a cold world, spirit where conditions have none. Calling it the "opium of the people" presents the viewpoint that it soothes pain instead of removing its causes.
Context reviewed