In our earthly world we have two types of thought, inner thought and outer thought, and because of that we have two modes of verbal communication. We are able to talk on the basis of both our inner and outer thought at the same time, and we are able to talk on the basis of our outer thought separate from our inner thought. In fact, we can say the opposite of what we think inside, which is something we do to put on appearances, insincerely agree with people, and play the hypocrite.
In the spiritual world, though, our thought process is single, not dual. There we say what we think. If we do not, we emit a horrible sound that hurts people’s ears. Nevertheless we have the option of being silent and not publicizing the thoughts in our mind. So when hypocrites come among the wise they either leave right away or throw themselves into a corner of the room, make themselves inconspicuous, and sit in silence.
Once there was a large conference in the world of spirits. This was the very topic they were discussing with each other. The participants were saying that it is a hardship for spirits who have had unacceptable thoughts about God and the Lord not to be able to say what they think when they come into the company of the good.
In the center of the participants there was a group of Protestants, many of them clergy, and next to them a group of Roman Catholics including monks. Both the Protestants and the Catholics were saying at first that it is not hard. “Why not say what we think?” they maintained. “If we happen not to think the right things, we can always close our mouths and keep quiet.”
The clergy said, “Who doesn’t have the right thoughts about God and the Lord?”
So some participants in the conference said to each other, “Let’s test these Protestants and Catholics!”
Some [in the central groups] were convinced that there is a trinity of persons in God. The participants told them to say and think “One God.” They were unable to. They twisted and puckered their lips into all sorts of shapes but they still could not articulate the sound of any words but those in harmony with their thoughts and mental images, which were of three persons and therefore three gods.
from True Christianity, Volume 1, Section 111