I was acting on 'pure' intuition/instinct. [=only because of intuition/instinct and not for any other reason]
Don't expect me to believe you're '(as) pure as the driven snow'. [=morally perfect]
The relationship is over, 'pure and simple'. [=the relationship is completely over]
(..) You don't want to find out. You want something to eat? No, thanks. What is this shit? This is blue. We used a different chemical process, but it is every bit as pure. It may be blue, but it's the bomb. Tight, tight, tight, yeah. Blue, yellow, pink. Whatever, man. Just keep bringing me that. (..)2008 TvShow: Breaking Bad Title: A No-Rough-Stuff-Type Deal Season: 1 Episode 7