The Spirits' Book
Book Three - Moral Laws
Chapter XII - Moral Perfection
913. What vice may we label as the root of the others?
“Selfishness, as we have repeatedly told you. Every wrongdoing can be traced back to selfishness. Study all the vices, and you will see that selfishness is at the root of them all. You will never succeed in eradicating them until, you attack them at their root, only then you have destroyed the selfishness that is their cause. All your efforts should be focused on this end, as selfishness is the plague of human society. All those who attempt to reach moral excellence must uproot every selfish feeling from their hearts, because it is incompatible with justice, love and charity; it offsets all other qualities.”