Sometimes the hardest things in life are the things most worth doing.

Castle: How do you know when you're in love?
Beckett: All the songs make sense.

Money doesn't change who you are, it just magnifies your personality.

He... a... touches things.

Beckett

Don't tell my mother.

So it's a reality show...without the reality.

Demons don't need help getting past security systems and the devil doesn't need to use the door.

Beckett

My daughter, my money. I'm coming.

Science fiction is not science.

Castle is famously fatherless.

Beckett

Beckett: You’re such a good son.
Castle: And you’re such a good everything.

I don't think date night counts when it's a candlelit dinner with the Butcher of Guadalajara.

From, "Don't ruin my story with your logic" to "We want the happy ending, we can't give up." Check out all of the great Castle quotes right here at TV Fanatic.

Castle Quotes

Castle: How do you know when you're in love?
Beckett: All the songs make sense.

Sometimes the hardest things in life are the things most worth doing.

Castle