Yoga Sutra of Patanjali designed and proliferated Yoga as a technique for evolving the mind. The mind is associated with thoughts.
Yoga is a practice that balances the mind. It consists of maintaining a balance between a quiet mind that is ‘still’ – a state where the thought waves are calmed, the mind is awake and in a present state where one is able to notice and observe what he/she is doing. In this state of balance, the chaos of thoughts about multiple things crossing around on multiple levels is controlled. Yoga Sutra of Patanjali 1.2 is referring to this still state of the mind.
When our mind attains the ‘still’ state – the ‘yoga’ state, pure harmonious state starts replacing all the disharmony, disturbance and distraction that the mind was previously engaged in.
Of course, talk about the mind – and the body is not far away. Over recent years many practitioners and yoga teachers have been inclined to reduce yoga to a set of physical practices for health and fitness, thus severely under-optimizing its potential.