Petyr Baelish (to Sansa): Don’t fight in the North or the South. Fight every battle, everywhere, always, in your mind. Everyone is your enemy, everyone is your friend… every possible series of events is happening all at once. Live that way and nothing will surprise you. Everything that happens will be something that you’ve seen before.

From Game of Thrones – Season 7 Episode 3: ‘The Queen’s Justice’ (7×03)