"That is called Yoga, whereby this cycle of birth and death ceases. This requires the utter transcendence of the wavering, unknowing mind and is achieved in two ways: Self knowledge, and/or the restraint of Prana. However, Yoga has come to mean only the latter, yet both the methods lead to the same result. To some, Self-knowledge through inquiry is difficult; to others, restraining Prana is difficult. But my conviction is that the path of inquiry is easy for all, because Self-knowledge is the ever-present truth. I shall now describe to you the methods of Yoga..."
The Yoga Vasistha ~ 500 CE, India