Who said "The young are always certain they know better."?

This quote is attributed to Lannister.

The young are always certain they know better. - Lannister

"The young are always certain they know better."

Lannister Knowledge

"A Lannister always pays his debts."

"I am the god of tits and wine."

"You are an awful man."

"I drink and I know things."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."