One of my teachers told me this story.
Spirit beings line up in long, long, lines to materialize a body and come to places like this Earth. They come for many reasons. Some come to just enjoy the beauty and the experience . Others come to help their fellow beings during their brief visit. Most come because you can make tremendous spiritual growth in a material body surrounded by other material bodies.
When a soul materializes a body and enters the material world they slowly or quickly lose awareness that they were ever anywhere else or something very different then what they think themselves to be while in a body on Earth.
Very few beings have any awareness of what they wanted to do while they have a body. The memory of their intentions vanish like the mist as the sun warms the day. Being ignorant of what they are and where they came from and what they are doing here, most people live lives very different then what they intended. Goddess/God just smiles, watching Her/His children play.
When death dissolves our bodies we return to our spirit awareness and look back at the adventure we have just experienced. Most beings feel a certain disappointment for a bit. Then they laugh and sign up for another go. Goddess/God just smiles.