It should be noted that the willful disposal of thought implies a degree of suppression. However, much of the emotional content of the thought is exhausted by the limited review of each created thought train. It is impossible to completely reduce the influence of thoughts because the process of reviewing itself creates more thoughts. That is, the process of thinking about thoughts itself leads to more thoughts. Therefore, there has to be a compromise: one has to release most of the emotional tension of the thoughts, but after a short period of time one has to suppress in order to create new thoughts. There is not enough time available to spend a long period following one train of thoughts. Therefore, one has to accept a small amount of suppression.
Combination of stage 2 and 3
You will note that we have combined stage 2 and 3 in the technique just described. That is, the willful creation and disposal of thoughts is stage 3; the period of watching the spontaneous eruption of thoughts at the chidakasha is stage 2. We have done this for a good reason; the willful creation of thoughts stirs up the subconscious; the period of watching the chidakasha allows stined up thoughts to bubble up and be exhausted.
Readiness for stage 4
After a certain period of regular practice of stage 3 you will find that spontaneous thoughts occur before you can choose a thought on which to dwell. The frequency and intensity of these thoughts is so great and overwhelming that you will find it difficult to decide on one thought for analysis. There is a state of psychic confusion. You are then ready to proceed to stage 4.