Who said "Solitude is the furnace where the soul is refined."?

This quote is attributed to Maxim Gorky.

Solitude is the furnace where the soul is refined. - Maxim Gorky

"Solitude is the furnace where the soul is refined."

Maxim Gorky Solitude

Novelist Playwright Russian 1868–1936

"Man is made of earth and water, and fire burns in his breast."

"When work is a pleasure, life is a joy!"

"The cure for boredom is curiosity. There is no cure for curiosity."

"Love is the most beautiful of all feelings, but also the most dangerous."

"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."