All people who were brought up properly are rational and moral. There are different ways of being rational, however: a worldly way and a heavenly way. People who have become rational and moral in a worldly way but not also in a heavenly way are rational and moral only in word and gesture. Inwardly they are animals, and predatory animals at that, because they are in step with the inhabitants of hell, all of whom are like that. People who have become rational and moral in a heavenly way as well, however, are truly rational and truly moral, because they have these qualities in spirit as well as in word and deed. Something spiritual lies hidden within their words and actions like the soul that activates their earthly, sense-oriented, and bodily levels. Such people are in step with the inhabitants of heaven.
Therefore there is such a thing as a rational, moral person who is spiritual, and such a thing as a rational, moral person who is only earthly. In the world you cannot tell them apart, especially if their hypocrisy is well rehearsed. Angels in heaven can tell the two apart, however, as easily as telling doves from eagle-owls or sheep from tigers. Those who are only earthly can see good and evil qualities in others and criticize them, but because they have never looked at or studied themselves, they see no evil in themselves. If someone else discovers an evil in them, they use their rational faculty to hide it, as a snake hides its head in the dust; then they plunge themselves into that evil the way a hornet dives into dung.
from Regeneration, Pages 43, 44