Eureka

Take a hint. 

it doesn't take an arrow
or an underline
you've been stepping on the clues all this time
plain and simple
like white, like cheese
like silence

By now you must have it
all figured out
that most things in life
are not rocket science

but a simply a matter of chemistry -

leaves and apples
balls and puzzles
all that fit and fall
by the rules of gravity