“The wise ones declare that the mind is caused by the movement of prana; and hence by the restraint of the prana, the mind becomes quiescent. When the mind abandons the movement of thought, the appearance of the world illusion ceases...
There are two seeds for the tree known as the mind which carries within it innumerable notions and ideas: first, the movement of prana and second, vasana or conditioning. When there is movement of prana in the appropriate channels, then there is movement in consciousness and mind arises...
Wise ones declare that the abandonment of conditioning and the restraint of prana are of equal effect; hence one should practice them simultaneously.”
Selections from Yoga Vasistha Chapter 5