The Spirits' Book
Book Three - Moral Laws
Chapter X - IX. Law of Liberty
Freedom of Conscience
842. All doctrines claim to be the sole expression of the truth. How can we recognize the one that is most deserving of this title?
“The truest doctrine is the one that has the fewest hypocrites and the greatest number of truly virtuous individuals. In other words, people practicing the law of charity in its greatest purity and in its widest application. This is how you may recognize a true doctrine, because any doctrine that causes rifts between God’s children is nothing but false and evil.”