food for thought
US /ˈfʊd fɔr θɔt/
UK /ˈfʊd fɔr θɔt/

1.
materia para reflexionar, algo en qué pensar
something that warrants serious consideration or reflection
:
•
His suggestion gave us all some serious food for thought.
Su sugerencia nos dio a todos algo de materia para reflexionar.
•
The documentary provided much food for thought on environmental issues.
El documental proporcionó mucha materia para reflexionar sobre cuestiones medioambientales.