What goes up … must come down.
So observed Issac Newton when he threw an apple into the air. Gravity.
And the saying persists: “What goes up must come down.”[audio:http://test.paris-savannah.com/wp-content/uploads/ex18057e1.mp3|titles=what goes up must come down]
Our world has its rules, its laws. Even if we do succeed in defying gravity … at least for a while!