"You need to know all you can know, and know it is all you can know, to know it all. It is as important to know what you can't know as it is to know what you know about the big picture of life. This is because you will waste time trying to know something that is impossible to know, that does not even matter, instead of living in what you can know.
There are things we can understand with our minds and things we cannot.
Infinity: Some things are beyond the mind, thus beyond understanding. The mind has to realize it has limitations. All infinite and never-ending things are beyond the mind, and the essence of everything is infinite and never ending. Example: we cannot comprehend that the universe goes out forever, but we can understand that it has to. It is impossible for the universe to stop going out. Something has to keep going out, even if it is just empty space. This tells us infinity exists. We can understand infinity exists without understanding infinity. Outer space is the easiest place to see infinity, but it is actually the nature of everything in one way or another.
Inner space: There is no end to inner space either. The truth is, there has to be an infinite number of universes inside every atom in our body. If you take a piece of cheese and cut it in half, and cut the half in half and keep going, you could cut forever, and you will never run out of something to cut.
You cannot make nothing out of something; it is impossible. Energy cannot be created or destroyed, and all matter is a form of energy. If you could make nothing out of something, you would be destroying energy, which is not possible. This is how you can use deductive logic to know something that could not be known any other way.
When you burn something up in a fire, you are just turning it into heat, light, ash and smoke; nothing is lost. The electricity that runs your TV or computer is not lost. You can look at it as water flowing through the cord into the screen and spraying out into the room and back into the environment again. Nothing is lost; it is just changed into another form, moving in a circle or cycle."
Page 168 of "The Present (with religion)"
http://www.truthcontest.com/entries/the-present-with-religion/limits-knowledge-infinity.html