Patañjali's Yogasūtra I.4

Yogasūtra of Patañjali | Viniyoga with Dr Kausthub Desikachar

Dr. Kausthub Desikachar is the current lineage holder of the Viniyoga® tradition worldwide. He succeeds his father TKV Desikachar, and his grandfather T Krishnamacharya. His objectives include the sharing of the authentic teachings of Yoga to the modern era, as well as building bridges between different healing modalities to promote physical, emotional social and spiritual health.

I.4 - vṛttisārupyaṁ itaratra

At other times, [when the mind is not in the state of Yoga,] the false projections of the mind [is established as the reality.]

A fluctuating mind can rarely focus on a single direction. If it ever does, comprehension of the object will be faulty.