Who said "True power requires solitude and absolute focus."?

This quote is attributed to Frieza.

True power requires solitude and absolute focus. - Frieza

"True power requires solitude and absolute focus."

Frieza Solitude

"I am the most powerful being in the universe!"

"You dare challenge me? How amusing."

"I have transcended beyond a normal Super Saiyan."

"Your resistance only makes this more entertaining."

"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."