The
soul in many religions, philosophical and mythological traditions, is the
incorporeal and
immortal essence of a living being. According to
Abrahamic religions, only human beings have immortal souls. For example, the Catholic theologian
Thomas Aquinas attributed "soul" () to all organisms but argued that only human souls are immortal. Other religions (most notably
Jainism and
Hinduism) teach that all biological organisms have souls, while some teach that even non-biological entities (such as rivers and mountains) possess souls. This latter belief is called
animism.