Who said "Solitude is the furnace in which great minds are forged."?

This quote is attributed to Stéphane Mallarmé.

Solitude is the furnace in which great minds are forged. - Stéphane Mallarmé

"Solitude is the furnace in which great minds are forged."

Stéphane Mallarmé Solitude

Poet French 1842–1898

"The flesh is sad, alas, and I have read all the books."

"Music is the art most nigh to tears and memory."

"I love the beautiful weather."

"Genius is the ability to renew one's emotions in daily experience."

"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."