Who said "I have learned that solitude is not loneliness."?

This quote is attributed to Hulk.

I have learned that solitude is not loneliness. - Hulk

"I have learned that solitude is not loneliness."

Hulk Solitude

"Hulk is strongest one there is."

"Don't make me angry. You wouldn't like me when I'm angry."

"Puny god."

"Hulk smash!"

"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."