The Yoga system as outlined by Patanjali is known as the Eightfold Path.
1. Yama
2. Niyama
Yama and Niyama require observance of ten negative and positive moralities-avoidance of injury to others, untruthfulness, stealing, incontinence, gift receiving (which brings obligations) and purity og body and mind, contentment, self-discipline, study of scriptures and devotion to God.
3. Asana (right posture): The spinal column must be held straight, and the body firm in a comfortable position.
4. Pranayama: control of prana, subtle life currents.
5. Pratyahara: withdrawal of senses from external objects.
The last steps are forms of yoga proper:
6. Dharana: concentration, holding the mind to one thought.
7. Dhyana: Meditation
8. Samadhi: Superconscious perception.
This Eightfold Path of Yoga, leads one to the final goal of Kaivalya (Absoluteness) or realization of the Truth beyond all intellectual apprehension.