What is darkness? There is darkness all around, and the creatures in the darkness are also dark inside.
What can save this creature, light!
What is light? The surroundings are shining, and the creatures in the light are also shining inside.
People in the darkness are in pain every day, so painful that they don't know what pain is.
People in the light are happy every day, so happy that they don't know pain or sadness.