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.

189. Vertical levels are matched in kind, with one following from another in sequence like a purpose, a means, and a result. Since horizontal or gradual levels are like levels of light to shade, warmth to cold, hard to soft, dense to sparse, coarse to fine, and so on, and since we are familiar with these levels from our sensory and visual experience while we are not familiar with vertical or distinct levels, I need to give particular attention to these latter in this part. Without familiarity with these levels, that is, we cannot see causes.

It is in fact recognized that a purpose, a means, and a result follow in sequence like antecedent, subsequent, and final events. It is recognized that the purpose produces the means and then produces the result through the means so that the purpose can be realized; and much more is recognized along the same lines. Knowing such things without seeing them by applying them to actual events, however, is only abstract knowledge. It lasts only as long as we are engaged in analytical thought on the basis of metaphysical principles. As a result, even though a purpose, a means, and a result do progress by distinct levels, still there is little if any knowledge of those levels in the world. Thinking only about abstractions is like something ethereal that dissipates; but if these abstract principles are applied to things of an earthly nature, then they are like something we see with our own eyes on earth, and they stay in our memory.