Who said "The strongest men are often the most lonely."?

This quote is attributed to Mountain.

The strongest men are often the most lonely. - Mountain

"The strongest men are often the most lonely."

Mountain Solitude

"I am the Mountain."

"The strong do what they can, and the weak suffer what they must."

"Ours is the fury."

"A man's worth is measured by his strength."

"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."