Who said "I've found that solitude is the greatest teacher."?

This quote is attributed to Aldrich Killian.

I've found that solitude is the greatest teacher. - Aldrich Killian

"I've found that solitude is the greatest teacher."

Aldrich Killian Solitude

"We all crave a feeling of purpose, of legacy. What will people remember about you when you're gone?"

"The ability to let go is what separates the strong from the weak."

"I've spent years perfecting myself, becoming something greater than I was."

"Fear is just another obstacle to overcome."

"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."