It means...
Food for thought is a classic metaphor used to describe an idea that can induce a person’s mind to think.
This idea can be anything, encouraging the reader ‘to think’ and can come from anywhere in the world.
Robert Southey wrote in 'A Tale of Paraguay' (1825): 'A lively tale and fraught with food for thought.'" It means that Tale of Paraguay gives the readers something to think about. Food for thought is a commonly used phrase hence it is self-explanatory altogether.
Overall Food For Thought is the food (idea) which is discussed for the
consumption of brain in order to provoke it to think further.
This idea can be anything, encouraging the reader ‘to think’ and can come from anywhere in the world.
Robert Southey wrote in 'A Tale of Paraguay' (1825): 'A lively tale and fraught with food for thought.'" It means that Tale of Paraguay gives the readers something to think about. Food for thought is a commonly used phrase hence it is self-explanatory altogether.
Overall Food For Thought is the food (idea) which is discussed for the
consumption of brain in order to provoke it to think further.