Who said "I've learned that solitude is expensive."?

This quote is attributed to Quark.

I've learned that solitude is expensive. - Quark

"I've learned that solitude is expensive."

Quark Solitude

"I'm a Ferengi. I don't have principals, I have profit margins."

"The way to a woman's heart is through her ears."

"A woman is like a warp core - handle with care or she'll explode in your face."

"Profit is its own reward."

"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."