Meaning: This sentence is describing the peacefulness of the night. It is saying that the moon is shining its light on the world, and that the world is peaceful and quiet.
Choice of Words: The words "moon casts glow" are used to describe the way the moon shines its light on the world. "Silver shimmer" means that the moonlight is silvery and shimmering. "World at rest" indicates that the world is peaceful and quiet.