The psychic grows through its contact and experiences of the world. With its growth there emerge the capacities and possibilities embedded in it as a seed.
What are the Upanishads? They are the treasure-house of the deepest eternal Knowledge without beginning or end which is the root and foundation of the eternal dharma.
The development of the psychic being passes through a number of stages. The first stage is when it is fully submerged in nature and has forgotten itself completely.
Since creation emerges from the Inconscience where it had plunged, there is the pull that the Inconscience exerts on the ascending soul. The tackling of these subconscious elements is important at some stage in the yoga.