When is there any stopping of negative thoughts and promoting of positive?
As long as one has not seen that one is dreaming. The negation and affirmation that takes place then derives from concepts, specifically from the concept that assumes objective existence [for those very appearances].
As soon as you know it's a dream, this kind of negation and affirmation are not relevant. Why not?
Because one has recognized that it is a dream. Such recognition corresponds to getting a glimpse of the fundamental nature of mind. When recognition is absent, negation and affirmation are present. When recognition is present, there is nothing to negate or affirm.
Composed by Khenpo Tsultrim Gyamtso Rinpoche, at Rocky Mountain Dharma Center, in the summer of 1991. Commentary on Ocean of True Meaning.
Translated by Jim Scott.