Three Days of the Condor

CIA analyst Joseph Turner tells a short order clerk, "You know van Gogh was thirty before he started to paint."
”Van Gogh never sold a painting in a whole lifetime...”
Referring to a coworker: ”He gets very panicky about butter.” (0:11)

Turner finds his coworkers murdered. (0:16)

The Major, by intercom: "This is the panic officer." (0:22)

Turner asks Higgins, "Are you insane?"
Higgins: ”Don’t worry.” (0:28)

Television reporter: "According to a police spokesman drugs were not involved." (0:48)

Higgins tells Turner, "I don’t know. That’s what worries me." (1:26)

Photographer Kathy Hale tells Turner, referring to smoking, "I quit 3 years ago." (1:36)

After killing Leonard Atwood, hit man Joubert makes it look like suicide. (1:45)

Higgins tells Turner, "We were worried about you."
”Are you crazy?” (1:51)

Reference in Out of Sight.