Seesaw of Forces: An Analogy of the Law of Three
If there were no Neutralizing or connecting force, Active and Passive Forces would stand in opposition to one another and nothing could happen. Now if the connecting force alters, the other two forces alter. We have to think of Neutralizing Force as something capable of tilting the balance between Active and Passive Force in such a way that active can become passive, and passive become active.
If you think of a triad as being like a plank supported near its middle on a stand or fulcrum so that one end is up and the other down, then if the fulcrum is moved a little towards the down-side, the end that is up will go down, and vice versa, as would a see-saw.
Maurice Nicoll, “Note on Triads" in Psychological Commentaries on the Teaching of Gurdjieff and Ouspensky (Vol. 5, p. 1642)