Quark and Odo in “Civil Defense”

Quark

"Why go to so much trouble to keep people out of the security office?"

Odo

"It's not to keep people out, it's to keep me in. I suppose, during the Occupation, the Cardassians considered their security chief a security risk."

Quark

"And I know why."

Odo

"Oh, do you?"

Quark

"It's because they knew you were an honorable man. The kind of person who would do the right thing regardless of the circumstances. And now your integrity… is going to get us both killed. I hope you're happy."