"Across the Universe" - The Beatles

1. "pools of sorrow, waves of joy"
2.  "words flowing like endless rain into paper cups"
3. "a million suns"

The first line, "pools of sorrow and waves of joy", sets pools of water as symbols for emotions, perhaps expressing that the artist's emotions are so strong that they are uncontainable and unpredictable just like water.

The sun can stand as a symbol for joy, good fortune, and a bright future.