Who said "Solitude is the refuge of the sage."?

This quote is attributed to Oswald Spengler.

Solitude is the refuge of the sage. - Oswald Spengler

"Solitude is the refuge of the sage."

Oswald Spengler Solitude

Historian Philosopher German 1880–1936

"The West does not move towards its end, but it has already ended."

"Money is congealed labor."

"All profound disturbances of peace are the end of something."

"The history of a culture is the history of its ideas."

"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."