She had a big heart, big enough for the both of us, had to be, I wasn't even human when we first met.

Dexter [on Rita]

I wish that it was just my mom and me and Cody and Harrison because we all would have been better off if she'd never met you.

Astor

His wife just died; he's submitting a lab report.

Quinn

I've watched 67 people die, and at the moment of truth I looked into their eyes and I knew - and they knew - they got what they deserved. But what if that's not what happens, if you don't get what you deserve?

Arthur: You think you're better than I am?
Dexter: No. But I want to be.

Deb: I love you.
Dexter: I'm so thankful.

Long after you're executed, they'll still have to go through life with your name branded across their foreheads.

Harry

We create our own destiny every day we live.

You can conquer whatever darkness is in you.

Rita [to Dexter]

How is it I can kill people and feel no regret, but disappointing Rita makes me feel like the scum of the earth?

Dexter: My dark passenger is ruining my life.
Harry: It is your life.

I want you to disappear from my life like a ghost, a really annoying ghost.

Trinity

Dexter Quotes

I don't wanna step on my dick.

Deb

Sometimes partners find us, and as much as we try to push them away, they work their way into our lives, regardless - until we finally realize how much we need them.

Dexter