According to A.C. Bhaktivedanta Swami Prabhupada's purport on text 3, Chapter 6 of the Bhagavad Gita: "The process of linking oneself with the Supreme is called yoga. It may be compared to a ladder for attaining the topmost spiritual realization. This ladder begins from the lowest materialcondition of the living entity and rises to reflect self-realization in pure spiritual life. According to various elevations, different parts of the ladder are known...