From a yogic perspective the mind should not be completely fixated. The mind is soft so that it is aware of one object, but it should move when it realises deeper aspects of the object, like when it realises aspects of the object that were not perceivable before, when the mind was wandering from one object to the next.

To hold our mind on one single object can be quite difficult, yet the benefit of deeper insight into the object of concentrations great. Concentration on one object is not impossible. It simply requires consistent and persistent practice. When the mind has been purified by the practices of the previous limbs, concentration will come by itself, naturally, without any special effort being required.