Sometimes agnostics will note it is possible that there are forces in the universe we cannot understand, and they are absolutely right. The observable universe is 92-94 billion light years in diameter, and we have no way of knowing, and will probably never know what lies beyond this cosmic light horizon. The thought of what exists on these unimaginable orders of magnitude inspires feelings of genuine wonder and reverence, but this is not a reason to remain agnostic about the origin and meaning of life on Earth.

At each observable order of magnitude, we see complicated orderings of matter and energy. There are layers of complexity and beauty, from quarks to superclusters. If we only had enough information we might be able to zoom out further and observe the large scale structure of the universe and the structure of whatever might exist at greater distance scales. There is no reason to assume that complex organization ceases at the largest order of magnitude that we currently have the ability to observe. Of course, we can have no information about what exists that is larger than the universe, but there is good reason to suspect there is something, and that it is ordered in some incredible and unimaginable way.

Some scientists have proposed an alternative to the big bang theory called the ekpyrotic theory of the origin of the universe. This theory imagines that our universe, which has three spacial dimensions, is a "brane" moving within a higher dimensional space, and that the expanding universe as we observe it is the result of a collision between branes. The ekpyrotic theory relies on certain assumptions of string theory, a controversial idea in theoretical physics.

The ekpyrotic theory of the origin of the universe is very speculative. Most likely, we will never be able to test the underlying assumption of string theory — that higher dimensions exist — but the existence of the ekpyrotic theory shows that scientists are willing and able to imagine that structure exists at scales larger than that of the observable universe.

The uncertainties about the origin of the universe are legitimate sources of wonder and doubt. It is entirely possible that intelligence exists at these scales, and it is even possible that such intelligence interacts with our universe in some way, but it has very little to do with the origin or meaning of our lives here on Earth.