What does it all mean?

They say
there are things
known as food for thought--
and this makes me wonder.
It makes me wonder
what is food,
and what is thought?
When one goes
and partakes of some sustenance,
is that for the mind,
or the belly?
Maybe studying helps our stomachs,
and food is only for the mind.
If that is the case,
then what is a fork,
and what is a pen?
Is a fork the new writing implement,
and a pen is used for eating?
This could cause many problems,
both with ink poisoning,
as well as knowing how a fork can be used to--
write?
What is everything in the big scheme of things?
Suppose the namer of all things
actually meant for a fork to be for writing,
and a pen for carrying meat and other such things--
but then what is meat?
Is meat that which comes from an animal,
and is digested by some to satisfy some thirst?
Or is meat some other "thing,"
such as toilet paper,
or a dustbuster?
These thoughts cause earthquakes and trauma
to the brain--
but someone must think of these things,
before some person eats a dustbuster with a pen.