There were so many quotes from Maggie Smith in Downton Abbey.
"What is a Weekend"
"Vulgarity is no substitute for Wit"
"I am never wrong"
"I' so sorry I thought you were a waiter"
"At my age, one must ration one's excitement"
I fell in love with this one
"You're a woman with a brain and reasonable ability, stop whining and find something to do"