(An extract from the book Eye to the Infinite, updated edition, chapter States of Conciousness.)
Sin, basically, strengthens ego, which strengthens the barrier, or sword, between the conscious and unconscious minds. Purity, holiness, altruistic behaviour and cleaving to G-d, on the other hand, create unity in the mind, allowing the Neshomoh and the subconscious’ influence to spread throughout the entire mind. The Neshomoh then has its own protection to the mind that actually works better than ‘the sword’ in protecting the mind: it creates its own shield, or aura, over the entire mind and person, sheltering even the conscious mind from hearing, seeing, or experiencing, anything that would act to the Neshomoh’s detriment.
However, whilst the sword is operational, we have to learn how to circumvent it, or at least understand what might easily and effectively dissipate its affect, so as to access the inner mind and even the Neshomoh, to harness the mind’s potential and heighten our awareness, to combine conscious focus with the infinite depth and perception of the subconscious.
 Called Chashmal.