In many religions, philosophical, and mythological traditions, the soul 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" (anima) to all organisms but argued that only human souls are immortal. Some other religions 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.
The soul is immortal, and immensely vast and beautiful; our conscious ego is slight and limited in comparison to the soul, despite the fact that we habitually mistake our ego for our true self; the souls of all are connected, and the soul is created by and has an existence similar to God, or rather God exists within us.