What is the immortal soul?

Life has indeed been a mystery to men. They do not know whence it comes, nor whither it goes, and yet they know they live. Is it not then a duty to learn to comprehend why you live and what you live for, not simply vegetate and die as an animal or as a plant? Mortals must learn to realise that they are not mere animals to live merely to gratify their sensual appetites and then perish, but that they are spiritual beings, possessing a life that is indestructible, that is above everything existing on this planet, the immortal soul or spirit.

―B. H. in Spirit