Yoga means union with the Supreme, the search for merging into God.  In order to reach this ultimate goal of our life, endeavour is necessary.  The spiritual exercises (sadhanas) – meditation, breathing exercise, self-purification, havan, bhajan, selfless service are already mentioned.

In the Bhagavad Gita three paths of yoga are described by Krishna: karmayoga (yoga of action), bhaktiyoga (devotion) and jnanayoga (wisdom).  These are not at all exclusive ways, but they are always combined, they are just named by the aspect that is prevailing.  And for all these ways truth is an essential aspect.  All these three paths lead you to liberation.

The physical exercises, Hatha Yoga, is meant to keep the physical body fit so that you are able to follow the spiritual path and, for example, sit for meditation and be able to concentrate on the third Eye.  And it also cures some diseases.  Guruji teaches relatively simple, but important asanas selected for this purpose.

                                    (from Guruji's Discourses in the book: From Humanity to Divinity)