D: When one enquires into the root of ‘self-conceit’ which is of the form ‘I’, all sorts of different thoughts without number seem to rise; and not any separate ‘I’ thought.
M: It is the rise of egoity that is the cause and source of the rise of all other thoughts; therefore, if the self-conceit of the form of egoity which is the root of the illusory tree of samsara (bondage consisting of transmigration) is destroyed, all other thoughts will perish completely like an uprooted tree.
Whatever thoughts arise as obstacles to one’s sadhana (spiritual discipline), the mind should not be allowed to go in their direction, but should be made to rest in one’s Self which is the Atman; one should remain as witness to whatever happens, adopting the attitude ‘Let whatever strange things happen, happen; let us see!’ This should be one’s practice. In other words, one should not identify oneself with appearances; one should never relinquish one’s Self. This is the proper means for destruction of the mind (manonasa) which is of the nature of seeing the body as Self, and which is the cause of all the aforesaid obstacles. This method which easily destroys egoity deserves to be called devotion (bhakti),meditation (dhyana), concentration (yoga), and knowledge (jnana). Because God remains of the nature of the Self,shining as ‘I’ in the Heart, because the scriptures declare that thought itself is bondage, the best discipline is to stay quiescent without ever forgetting Him (God, the Self), after resolving in Him the mind which is of the form of the ‘Ithought’, no matter by what means. This is the conclusive teaching of the scriptures.
Source: Collected Works Part One Book