You are a purely spiritual being. The body is material and only exists for a little while, but your soul is eternal, and that is your true identity. Your soul is made from the same eternal substance as God's being. God's total energy is in three parts, His internal, external, and marginal potency. His internal energy is fully alive and eternal, being completely spiritual. Everything that has life relies on this internal energy of the Lord. His external energy is what the physical universe is made out of, everything material including our bodies. This material energy is called maya or illusion and is a dark covering obscuring the spiritual energy. All living entities are called the marginal energy of the Lord, because they are both living and spiritual and are covered by the external illusory energy of the Lord called maya. The purpose of life is to put off the illusory covering of the body by becoming detached from the material manifestation of the Lord's bewildering external energy. This can only be done by fixing the will and the senses in devotional service to Lord Krishna.