Quote
1. Quote - Listen to the quote and guess what the slang means.

The universe is not required to be in perfect harmony with human ambition.
Astronomer Carl Sagan talking about how humans and the universe relate. (BrainyQuote)
Definition
1. Definition - Study the definition.
together peacefully; in unison with someone or something
2. Use - Learn how the slang is used.
Have you ever felt really in tune with someone else? Did you ever do an activity with someone and feel a natural connection with them? In English, we call this feeling being in perfect harmony.
When one is in perfect harmony with someone or something, it means that two different people or things are working together in unison. For example, when musicians play together in a band, they know each other’s styles and play together as one body. One can say they play music in perfect harmony together.
Astronomer Carl Sagan thinks that people’s desire to succeed and win makes them forget about the flow of nature. He believes that the universe does not need to change its rhythm to be in perfect harmony with human actions.
Have you ever been in perfect harmony with someone?
Examples
1. Examples - Hear some example sentences.
“Malik and Haley sang in perfect harmony together during the concert. “
“When you live in perfect harmony with nature, you respect the natural environment and keep it clean. “
“The twin brothers played in perfect harmony, and never fought over toys.”