Who said "Solitude is the soul's conversation with itself."?

This quote is attributed to Julius Rosenthal.

Solitude is the soul's conversation with itself. - Julius Rosenthal

"Solitude is the soul's conversation with itself."

Julius Rosenthal Solitude

Banker & Philanthropist American 1862–1928

"Life is what happens while you are busy making other plans."

"The only way to do great work is to love what you do."

"In the middle of difficulty lies opportunity."

"Love is the bridge between two hearts."

"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."