Well, the bible or US foreign policies have nothing to do with the box other than they may contribute to its construction. "The box" is a mental state, our perception of reality, particularly, but not exclusively, in western civilization. Our definitions of reality and how we perceive that reality are ingrained in us since birth.
I and many others have had experiences that fall outside the accepted "norm" of what is "real". Some might say that I hallucinated or that I was on drugs or any assortment of "reasons" to discredit the validity of those experiences because they cannot see how they could have been possible within "the box" of accepted views of reality.
It is my contention that what we call reality is a mental construct based on misconceptions, half truths and outright lies. That is why I say that the truth, reality and god are relative to the beholder, that perception of reality is based on our cultural, religious and political bias that were fed to us by parents, peers, media and school. For example, an Australian Aborigine raised and living in the desert, living on grubs has a very different understanding and perception of reality from that of a Canadian mother living in suburbia. Said mother has no conceptual way to evaluate the validity of the "Dreamtime" which is central to Aborigine spirituality and world view. Likewise, does a Pentagon General have no concept of the spiritual significance of the Sweat Lodge ceremony central to Native Americans. Even if he/she should happen to participate in a sweat, the likelihood that will understand the significance is slim.
There are dimensions of reality that fall outside accepted views, so they are ignored or unperceived because the mind of the beholder is incapable of processing such data. There have been people who have seen aliens, angels, animal spirits and any number of apparitions but most people just write them of as crazy or food poisoning - anything to justify their incapability to comprehend the possibility that those people actually saw what they say they saw. To me, it all a matter of belief, cultural upbringing and a willingness to open oneself up to the possibility of a greater view of reality.
The "box" to me is restricted view and belief about the possibilities in reality. Science and religion do not help because both have dogmatic restrictions on what is possible.