Walter White

"I am the one who knocks."

"You asked me if I was in the meth business or the money business. Neither. I'm in the empire business."

"A man provides. And he does it even when he's not appreciated or respected or loved."

"I did it for me. I liked it."

"Chemistry is the study of change. It's growth, then decay, then transformation."

"You cannot have a great life and a great relationship with your children at the same time."

"I have learned one thing: never say never."

"The real lesson is that you are never too old to change."

"Goodbye."

"I've come to realize that my life has been defined by a desire to provide."

"We are not in danger, we are the danger."

"Chemistry, well actually chemistry is growth, then then it's then it's decay, then it's transformation."

"You know what I realized? My great grandfather's beer was called Schnapps. No, wait, that's not my great grandfather's beer."

"There are things that are greater than myself."

"I am awake."

"The choices we make dictate our own mortality."

"I have risked everything."

"This is my area of expertise."

"I don't have any money anymore."

"I've been dead inside for a long time."

"What's the problem with you people?"

"I have a serious condition."

"Anything else, anything else you can imagine."

"I am a man of science."

"You know what they call a Quarter Pounder with Cheese in Paris?"

"Tread lightly."

"I built a lab."

"This is not my best work."

"I could do this all day."

"One must be present in order to appreciate the moment."