The Spirits' Book
Book Three - Moral Laws
Chapter XI - X. Law of Justice, Love and Charity
Natural Rights and Justice
876. Apart from the rights established by human law, what is the basis of justice according to natural law?
“Christ told you, ‘Do unto others as you would have others do unto you.’ God has placed in each of you the desire to see your own rights respected as the rule of true justice. When uncertain as to what we should do in regard to others at any given moment, we should ask ourselves what we would want others to do to us under the same circumstances. God could not give us a safer guide than our own conscience.”
The true measure of justice is, in fact, wanting for others what you would want for yourself. Merely wanting for yourself what you would want for others is not exactly the same thing. As it is unnatural to wish harm upon yourself, if we use our personal desires as the guide for our behavior towards our neighbors, we would never wish anything but good upon them. Universally, human beings have always sought to enforce their personal rights, while the unique factor of Christianity is the application of personal rights as the basis of our neighbors’ rights.