The Yoga Sutras of Patanjali is the most authoritative text on Yoga as a practice. It is also known as the Yoga Darshana because it is the fundamental text of Yoga as a philosophy (though practice is discussed), one of the six orthodox systems (darshanas) of Sanatana Dharma, the Eternal Religion.
There is no need to have "faith" in these texts, for their statements can be verified by any reader, as has been done over thousands of years by countless yogis in India. A virtual army of self-realized men and women have proved their veracity and accuracy. Many of them are living right now as witnesses to the truth of Sanatana Dharma, which is based on the principle that all sentient beings are destined to attain liberation–union with divinity–since they are eternal parts of the Supreme Spirit, the Purushottama.
In Yoga: Science of the Absolute, Abbot George Burke draws on the age-long tradition regarding this essential text, including the commentaries of Vyasa and Shankara, the most highly regarded writers on Indian philosophy and practice, as well as I. K. Taimni and other authoritative commentators, and adds his own ideas based on half a century of study and practice.Serious students of yoga will find this an essential addition to their spiritual studies.