Mind, through ignorance and in-discrimination considers its false personality to be true and thinks it is the doer of all Karmas and thus becomes egoistic. It imagines that it is in bondage. It identifies itself with the Embodied Soul; it becomes Embodied Soul itself and takes the responsibility upon itself for doing good or bad Karmas and enjoying or suffering from their fruits. Hence is mind the doer of Karmas (actions) and responsibility for the Karmas, therefore, rests with it.
Mind is the stealer of Soul. It is a thief. Mind drags the Embodied Soul into sensual enjoyments. Embodied Soul is the reflected intelligence in mind. Mind and Embodied Soul always live together. They cannot be separated. Slay the mind, the stealer of Soul, through Self-Inquiry, Reflection, constant and profound meditation on Soul.
Mind has the potency of creating or undoing the whole world in the twinkling of an eye. Therefore, slay this mind, the slayer of Soul, whether through the destruction of latent subtle desires or the control of Prana (vital breath) or Self-Inquiry and “I am Soul” attitude. The best means of disposing of this great danger of Maya involving all in pains is the destruction of mind.
With the destruction of the mind, all the three periods of time vanish into nothing. With the destruction of mind, Soul begins to dawn. The extinction of subtle desires, annihilation of the mind and understanding of the Reality, when practiced together for a long time are regarded as fruitful. They should be practiced at a time. So long as these three are not equally practiced again and again, the Supreme Seat cannot be attained even after a lapse of hundreds of years. Through the practice of these three for a long time, the firm knots of the heart are cut without doubt, like the breaking of the threads in a lotus-stalk rent in twain.
Mind – Its Mysteries and Control by Sri Swami Sivananda