Vijnana is the consciousness in the mind or consciousness itself as the mind, which projects itself as an outside world of perception. The world actually does not exist. The Vedanta refutes this position. The Commentary of Acharya Sankara is long on this particular Sutra. The non-existence of the world cannot be accepted.
Some people open their eyes.
The Vedanta is a difficult subject. Very difficult subject. That there is nothing at all outside, and it is only the mind moving outside as is proclaimed by the Vijnanvada theory of Buddhism, is refuted. Acharya Sankara's commentary is elaborate, worth reading again and again. A non-existent idea, an impossible idea cannot arise in the mind.