"Chaos isn't a pit. Chaos is a ladder." This was said on TV by which character in "Game of Thrones"?

The phrase "Chaos isn't a pit. Chaos is a ladder." was said on TV by Petyr Littlefinger Baelish in the series "Game of Thrones". This comment was first made in season three, episode 6, 'The Climb', during a discussion between Baelish and Lord Varys. “Chaos isn't a pit. Chaos is a ladder,” Baelish told the Spider after he handed Ros over to Joffrey for double-crossing him. “Many who try to climb it fail and never get to try again. The fall breaks them. And some, are given a chance to climb. They refuse, they cling to the realm of the gods or love. Illusions. Only the ladder is real. The climb is all there is.”

Next, in "Game of Thrones" season 7, episode 4, 'The Spoils of War', in an oral exchange between Petyr Littlefinger Baelish and Brandon Stark, the words "Chaos is a ladder" are used by Brandon. He is letting Baelish know that he will have very little, if any, luck in deceiving him. He knows that Baelish played a role in his father Ned's death, and the prior actions by Baelish could have placed him on Arya's kill list.