The phrase "Where we are, there's daggers in men's smiles" is from William Shakespeare's play Macbeth , spoken by Donalbain, King Duncan's son, in Act 2, Scene 3. It means that people may appear friendly or kind on the outside, but they might actually be hiding dangerous or harmful intentions beneath their smiles. The "daggers" metaphorically represent threat, betrayal, and deceit concealed behind seemingly pleasant expressions. This line reflects a key theme in Macbeth —appearance versus reality—and captures the atmosphere of mistrust and danger immediately following King Duncan's murder. Donalbain realizes that those around him might not be genuinely loyal, cautioning that smiles can mask weapons of betrayal. It also foreshadows the ensuing violence and treachery in the play.