At this advanced point, mentally dissolve each thought into undifferentiated Thought. Don't reason about the latter but try to be it and to feel it. Use imagination here rather than reasoned thinking. Reasoned reflections should have been pursued and finished during metaphysical studies and not carried into this contemplation. Picture it, instead of reflecting on what it is like.
-- Notebooks Category 23: Advanced Contemplation > Chapter 7: Contemplative Stillness > # 199