The teaching of the Surat Shabd Yoga is a path of personal spiritual attainment under the guidance of a living spiritual master. The basic teachings consist in opening the inner eye or third eye to develop vision of inner light and inner sound. This is considered to be the power of the unmanifested Godhead coming into expression and is called "Word" in the Bible, and "Naam", "Shabd", "Om", "Kalma", and other names in the other scriptures. Kirpal Singh taught that the practice of meditation on the Divine Word, or the Yoga of the Sound Current (Surat Shabd Yoga) was at the spiritual base of all religions.