You can't get involved. It's the line we walk.

Danny: I bet you can't wait until tomorrow, Sarge.
Sarge: How's that?
Danny: Because you get smarter every day.

So what is your fraternity handshake, a punch in the eye?

I don't think his gun shoots gumdrops and lollipops.

I'm just checking on my kid brother, Sarge. If anyone at IA got a problem with it they can bite me.

I don't have much faith in the testimony of someone driving 50 miles an hour, running late for work.

Kate: Since when do detectives catch car accidents?
Danny: When they don't think they're accidents.

You wish you could turn into Supergirl and just put the entire family inside your little force field and keep them safe.

I never eat or drink anything I can't pronounce.

Kate: Is there any aspect of public service you Reagans are not involved in?
Danny: Politics. Too many crooks in that.

And here I thought all Narcotics detectives were a bunch of cocky dirtbags.

Lansing: You try giving up coffee.
Danny: You'll have to pry that from my cold, dead hands.

Blue Bloods Quotes

There's something you should know about police officers… They know what people are capable of in ways that most thankfully do not. They have seen first hand the cigarette burns on an infant's back or the black eyes and the sideways jaw on an 80 year old rape victim, and they assume the worst. And they take that on so that good people can go on about their lives and think generously about their fellow man. They provide that luxury.

Frank

Danny: Seems like the judge took a double header off the roof.
Anthony: On his own?
Danny: Who knows. Maybe it was an accident.
Erin: It wasn't. Chou Lin did this. She's trying to force a mistrial. And I need you to prove it.