“The thought, “Me, me” that your mind tightly apprehends from the depths of your heart, even when sunk in a deep sleep, is the innate apprehension of self. When someone accuses you falsely of making a mistake that you have not made, you think, “I didn’t make that mistake yet I am being accused of it.” Then a strong apprehension of “I” appears from deep within you and the way innate grapsing at self apprehends the “I” is clear. That is the time for a small portion of your mind to examine the “I” that the mind grasps and how it grasps it.”
From The Easy Path – Stages of the Path to Enlightenment by Panchen Lobsang Chokyi Gyaltsen
As translated in: The Easy Path to Travel to Omniscience: A Practical Exposition of the Stages of the Path by Panchen Losang Chokyi Gyel Tsen, which is included in The Pearl Garland: An Anthology of Lamrims, translated from the Tibetan under Venerable Dagpo Rinpoche’s guidance by Rosemary Patton, Editions Guepele (France).