The problem of the box is that it assumes we know everything about ourselves and our surroundings. We cannot. We barely even know ourselves. Yet we attempt to place ourselves and others into these boxes. We even cannot measure our minds, so what are we to set any limits?
We can measure the kilocalories in our food, but we do not very well understand all the systemic effects on individuals of the food we eat. Each one of us is rather unique superorganism which is made much more than just our bodies. One third of our bodies is in fact bacteria populations, which are again rather unique.
Boxes, also known as limits are descriptive language, which useful is in existing incrementally the present. However, we must be prepared to discard and challenge these boxes at each turn. They are attempting to describe something that perhaps cannot even be described by words alone.