The small spiritual spark, the living entity, very small, we cannot even imagine with our material brain. It is one ten-thousandth part of a point. We, in the material world, we cannot measure the length and breadth of point. Therefore those who are mathematicians, they say: "Point has no length, no breadth." But actually that is not a fact. You have no eyes to see the length and breadth of the point. You are so blunt, your senses are so limited, imperfect, that you cannot imagine that a point can have length and breadth. But we get information from Vedic literature, not only the point, but one ten-thousandth part of the point is measured. Keśāgra-śata-bhāgasya śatadhā kalpitasya ca, jīvo bhāgaḥ sa vijñeyaḥ (Śvetāśvatara Upaniṣad 5.9).
Because we have no imagination, we have no instrument, neither we have sufficient knowledge what is the length and breadth of the form of the living entity. Therefore Vedic literature gives you an idea that you just try to imagine one ten-thousandth part of the point, and that is the measurement.
- keśāgra-śata-bhāgasya
- śatadhā kalpitasya ca
- jīvo bhāgaḥ sa vijñeyaḥ
- sa ānantyāya kalpate
- (Śvetāśvatara Upaniṣad 9)