Causa sui
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Causa sui (Latin pronunciation: [kawsa sʊi], meaning "cause of itself" in Latin) denotes something which is generated within itself. This concept was central to the works of Baruch Spinoza, Sigmund Freud, Jean-Paul Sartre, and Ernest Becker, where it relates to the purpose that objects can assign to themselves. In Freud and Becker's case, the concept was often used as an immortality vessel, where something could create meaning or continue to create meaning beyond its own life.
In traditional Western theism, God cannot be created by any other force or being, therefore God is either self-caused (causa sui) or uncaused.