Instruct the Israelites to remove from camp anyone with an eruption or a discharge and anyone defiled by a corpse. Remove male and female alike; put them outside the camp so that they do not defile the camp of those in whose midst I dwell. (N. 5:2)
What is the problem with people who have various physical ailments being in the camp, in the presence of G-d? After all, G-d created the whole world and everything in it. So why cannot anything in the world also be close to the divine presence?
Perhaps the answer is simple: that G-d, as a purely spiritual entity, is distinct from physical nature? And even though man is described as made from physical dust, we are also described in the Torah as being ensouled by the divine spirit?
Could all of these commandments be simply justified by nothing more complicated than the idea that, to be close to G-d, we must be as far away as possible from our underlying animal qualities and frailties?
Is it because G-d is spiritual that we are to be as separate as possible from death, and the necessary – but distinctly unholy – animal functions of our bodies?