I had this thought as a bit of a lark. an argument to prove the universe does not in fact exist. But it leads me to a question. What is the sum total of all energy in the universe? Ok what I thought was... a basic tenement in physics is for every action there is an equal and opposite reaction. so If I was to push against a wall it pushes back at me with the same level of force. or probably more accurately it resists my push with a resistance equivalent to my push. Thus the sum of those forces is zero, my 1f plus the walls -1f ie. 1 + -1 = 0 (don't worry about me breaking the wall I am not strong enough. And if I did the result is the same except now it includes the ground, air resistance, my leg muscles stopping me from stumbling etc...) Now please remember this started as a bit of fun so please don't mock me too much Therefore for all force in the universe there is an equal and opposite force acting and thus the sum of all force is zero. If the sum of all force in the universe is zero and therefore the sum of all energy in the universe is zero. we could argue the universe does not exist. because all matter is made up of energy. So all bullshtting aside what is the sum of all energy in the universe is it zero or some massive figure? If it is some massive figure where did it come from? If its zero then does the universe exist? I am sure someone with a greater grasp of the English language and physics terminology could have written this better but I think it gets across the idea.