256. In its own right, the earthly level of the human mind is a continuum, but because of its responsiveness to the two higher levels, it seems to have distinct levels when it is raised up. Even though it is hard for people to understand this if they are not yet familiar with vertical levels, it still needs to be disclosed, since it is a matter of angelic wisdom. While earthly-minded people cannot think about this wisdom the way angels do, they can still grasp it mentally if their minds are raised into the level of light that angels enjoy. Our minds can actually be raised that far and enlightened accordingly. However, this enlightenment of our earthly minds does not happen by distinct levels. There is instead a gradual increase, and in keeping with that increase, our minds are enlightened from within, with the light of the two higher levels.

We can understand how this happens by perceiving that for vertical levels, one is above the other, with the earthly level, the terminal one, acting like an inclusive membrane for the two higher levels. As the earthly level is raised toward a higher level, then, the higher activates that outer earthly level from within and enlightens it. The enlightenment is actually happening because of the light of the higher levels from within, but it is received gradually by the earthly level that envelops and surrounds them, with greater clarity and purity as it ascends. That is, the earthly level is enlightened from within, from the light of the higher, distinct levels; but on the earthly level itself, it happens gradually.

We can see from this that as long as we are in this world and are therefore focused on the earthly level, we cannot be raised into wisdom itself, the way it is for angels. We can be raised only into a higher light at the boundary of angels and receive enlightenment from their light, which flows into us from within and illumines us.

I cannot describe this any more clearly. It is better understood through its effects; for if we have some prior knowledge about causes, their effects embody and present them in the light and thereby make them clear.

260. The earthly mind, being the envelope and vessel of the higher levels of the human mind, is reactive. If the higher levels are not opened, it acts against them; whereas if they are opened, it acts with them. I explained in the last section that since the earthly mind is on the last level, it surrounds and encloses the spiritual mind and the heavenly mind, which are on higher levels. Now we have reached the point where I need to show that the earthly mind reacts against the higher or inner minds. The reason it reacts is that it does surround, enclose, and contain them. This could not happen without that reaction, since if it did not react, the enclosed inner elements would start to spread and force their way out so that they dissipated. It would be as though the coverings of the human body were not reacting, in which case the viscera within the body would spill out and trickle away; or it would be as though the membranes around the motor fibers of our muscles did not react against the forces of those fibers when they were activated. Not only would the action cease, the whole inner weblike structure would unravel as well.

It is the same with any terminal vertical level. So it is the same with the earthly mind relative to the higher levels, since as I have just said, there are three levels of the human mind, earthly, spiritual, and heavenly, and the earthly mind is on the final level.

The earthly mind's reaction against the spiritual mind is also the reason the earthly mind consists of substances from the earthly world as well as substances from the spiritual world, as noted in 257 above. By their very nature, substances of the earthly world react against substances of the spiritual world, since substances of the earthly world are intrinsically dead and are activated from the outside by substances of the spiritual world. Anything that is dead and is activated from the outside resists by its very nature, and therefore reacts by its very nature.

We can tell from this that the earthly self reacts against the spiritual self, and that there is a conflict. It is all the same whether we refer to the earthly self and the spiritual self or to the earthly mind and the spiritual mind.