Yoga means Samadhi, i.e. Harmony or integration-thus Yoga is the art if Integration which enhances Harmony at all levels of the human personality. Every human personality has 5 layers of existence - Pancha Kosha Viveka.
Annamaya Kosha - the physical sheath
Pranamaya Kosha - the sheath of breath
Manomaya Kosha - the mental sheath
Vijnanamaya Kosha - the sheath of intellect
Anandamaya Kosha - the sheath of bliss.
The path of Yoga is to integrate and hormonise all these 5 layers of existence. Pathanjali Maharshi, the codifier of our ancient Yoga systems is believed to be the author of the most ancient text on Yoga Pathanjala Yoga Darshanam
Pathanjala Yoga Shastra is a holistic Human Integral Science. It comprises of 4 Padas.
The prevalent notions about yoga in the West and also in the present day India is only Asanas - body postures, as described in Ashtanga Yoga viz Yama, Niyama, Asana, Pranayama, Pratyahara, Dhaarana, Dhyana and Samadhi. The need of the day is to replace it by a broader and meaningful vision and approach to yoga. Pathanjala yoga Darshanam is a true torch bearer to all yoga aspirants in the modern times to release oneself from stressful chaotic life towards integration and harmony.