This is how I like to think about life, souls, and God.

Imagine that God is the ocean. Vast, nearly unlimited ocean of water.

When you are born, it is like taking a bottle, filling it with water from the ocean, and capping it. The ocean has so much water that it doesn't mind, and enjoys sharing its vastness.

The bottle is your body, the water is your soul.

As you experience life, your experiences and life get stored in the water of your soul, and transmitted back to the ocean of knowledge (source.)

When you return to death, you are merely uncapping the bottle and dumping the water back into the ocean (soul returning to its Source.)