What is the difference between atonement and propitiation in the context of religious beliefs?

In religious beliefs, atonement refers to the act of making amends or reconciling with a higher power for one's sins or wrongdoings. Propitiation, on the other hand, involves appeasing or satisfying a deity's wrath or anger through a sacrifice or offering. Both concepts involve seeking forgiveness or favor from a divine being, but atonement focuses on reconciliation while propitiation emphasizes appeasement.