It means that everything in the world has a soul, not a walking corpse, not a glutton. When you have spirituality, when you have spirit, even if you have no body, your spirit still exists between heaven and earth, and your charm still walks between heaven and earth.
If you have no soul and no true spirit, you are just a puppet between heaven and earth, and there is not much difference between life and death. When you penetrate the soul, you get eternal life. Your spirit is different from those puppets. You will never die.
With a thorough understanding, there is a soul. How can you understand these meanings when you want everything in the world, when you are selfish and have desires?