This part of the poem compares people to lyres, which are musical instruments. how does the poem describe the sound the strings make? what idea about humans is expressed through this description?

The strings are always making new sounds

Explanation:

This idea reflects the perception that humans are not the same, and they are always evolving, no matter if physically or emotionally. Human's perception related to the world is always changing, creating new things, expressing their feelings in different ways, trough different sounds. As said by Heraclitus, a pre-Socratic Ionian Greek philosopher, nothing in nature is static, it is always moving.