Who said "The Loneliness One dare not sound is the most profound."?

This quote is attributed to Emily Dickinson.

The Loneliness One dare not sound is the most profound. - Emily Dickinson

"The Loneliness One dare not sound is the most profound."

Emily Dickinson Solitude

Poet American 1830–1886

"Hope is the thing with feathers that perches in the soul."

"Tell all the truth but tell it slant."

"I dwell in Possibility."

"Because I could not stop for Death, he kindly stopped for me."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."