Who said "Hope is a dangerous thing"?

This quote is attributed to Tyrion Lannister.

Hope is a dangerous thing - Tyrion Lannister

"Hope is a dangerous thing"

Tyrion Lannister Hope

Character in A Clash of Kings

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"I drink and I know things"

"I drink and I know things."

"Never forget what you are, for surely the world will not."

"All dwarfs may be bastards, yet not all bastards are dwarfs."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."