People work together, when it suits them. They're loyal, when it suits them.They love each other, when it suits them.And they kill each other, when it suits them. Orell (Wildling)

When you play The Game of Thrones, you win or you die. There is no middle ground. 

Cersei Lannister

Ooo, I'm a monster. Perhaps you should speak to me more softly then. Monsters are dangerous and just now kings are dying like flies.

Tyrion Lannister

Power resides where men believe it resides.It's a trick, a shadow on the wall.And a very small man can cast a very large shadow.

Lord Varys

Money buys a man's silence for a time.A bolt in the heart buys it forever. 

Petyr Baelish (Littlefinger)

Chaos isn't a pit. Chaos is a ladder.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, but they refuse. They cling to the realm, or the Gods or love... illusions.Only the ladder is real. The climb is all there is. 

Petyr 'Littlefinger' Baelish