It is a holistic system for the mind body and soul. The Patanjali Yoga Sutras have said that Yoga is controlling the patterns of the mind -Chitta Vritti. These currents of consciousness contain, either, inertia i.e. Tamsic or active i.e. Rajsic, but never pure and tranquil i.e. Sattwic, elements, if the latter was the case, we would not need Yoga, Sattwa is unconditional and even our expression of love and compassion which we may say is pure are not, because of the conditioning behind our expression of pure traits. The progression as such must of course be seen in relation to the personality make up of each person. Progress from one level to the next, or a simultaneous progression in all depends upon different aspects of the human personality, and the personal experience of each person.
Yoga says that there are four major tendencies which bear upon personality and behavior.
These four tendencies are linked to the 7 chakras in our body. These 6 are the areas of our blocks and when we practice bandhan in Yoga these areas get affected in the sense of removing the blocks.