We are not human because of our faces and bodies but because of our power to understand and our power to will, so “earthly-minded person” and “spiritual-minded person” refer to our understanding and will, which can be either earthly or spiritual. When we are earthly-minded, we are like an earthly world in respect to our understanding and will and can even be called a world or microcosm. When we are spiritual-minded, we are like a spiritual world in respect to our understanding and will, and can even be called a spiritual world or a heaven.
We can see from this that earthly-minded people, being a kind of image of the earthly world, love whatever has to do with the earthly world, while spiritual-minded people, being a kind of image of the spiritual world, love whatever has to do with that world or heaven. Spiritual-minded people do love the earthly world, it is true, but only the way householders love their servants, who enable them to be of service. In fact, the earthly-minded people become spiritual in a way through their service. This happens when an earthly-minded person feels the joy of service from a spiritual source. This kind of earthly-minded person is called “earthly-spiritual.”
Spiritual-minded people love spiritual truths, not only loving to know and understand them but intending them as well; while earthly-minded people love to talk about these truths and carry them out as well. Putting truths into action is being of service. This ranking comes from the way the spiritual world and the earthly world go together, since anything that surfaces and exists in the earthly world has its cause in the spiritual world.
We can tell from this that spiritual-minded people are completely distinct from earthly-minded people, and that the only communication between them is the kind that occurs between a cause and its effect.
from Regeneration, Pages 105-106