By practicing meditation as mentioned in any of the earlier mentioned methods, the person is able to meditate on the smallest object, i.e atom or on a mighty object which is infinite like the universe. Thus, we can see that as the mind becomes calmer and calmer in meditation, it can concentrate on the smallest object and also on the universe. So the prerequisite is we should meditate. Right now I am practicing 25 mins meditation/day which I plan to take it to 60 mins by the end of the readings of this sutra.