The Greeks asked questions and came to conclusions that were either right or wrong but they attempted to understand the universe they were in. I know that there were only a few of them that asked, most were content to allow the gods to rule over their universe; in other words everything is beyond question.
Unfortunately we are doing the same thing today allowing Scientists to squash fundamental questions under the guise that it is too mysterious for mere man to understand. This is a trap! It is only an attempt to stay in power.
Keep asking your questions and don't allow others to keep you quiet. The speed of light is important that is how realities are seperated. Every particle is a universe and the universe is a particle. Gravity and EM are related, they are both properties of the subspaces that make them up. Sounds like gibberish? It actually isn't but it took me 40 years to put this view together. Now to me Guions and quarks sounds like gibberish because they follow UML object code definitions. Redefining the universe in terms of a gigantic computer program is not going to provide any insights.
My ideas are at
http://subspaceuniverse.com