Compose, Recite
If you want to say how eternity sounds you have to compose a poem. Or an essay. Or a song. Recite those deep thoughts about eternity and impress everyone who hears it.
Try to compose a poem about eternity right now. Just jot it down somewhere.
えい
よ, うた
None
You decide to compose a poem about an acorn (えい). The tiny acorn is the perfect vessel for you to say how eternity feels to you.
Let me recite the acorn poem to you now: Acorns start small Grow up big and tall Spread their baby acorns for all Live on for all eternity