"I am not in danger, Skyler. I am the danger."
— Walter White
I Am Not In Danger Skyler
I am not in danger, Skyler. I am the danger.
About this quote
Walter White delivers this line in Season 4, Episode 6 ("Cornered") of Breaking Bad, in a confrontation with his wife Skyler (Anna Gunn). Skyler, increasingly terrified by Walt's criminal life, fears someone will come after the family. Walt responds with chilling calm, correcting her assumption that he is a victim. Written by Vince Gilligan, this speech is widely regarded as the moment Walter White fully became Heisenberg.
Source
Breaking Bad, Season 4, Episode 6: 'Cornered'