We have to accept these things that we are prone to commit mistake, we are illusioned, we cheat, and our senses are imperfect. Then how I can give you perfect knowledge? That is not possible. But if you accept the Vedic knowledge . . . just like I gave you the example: Vedic knowledge says sometimes contradictory. Just like cow dung, stool of an animal, is pure. And if you analyze, you will find it is pure. So our process of acquiring knowledge is from the Vedas. Vedaiś ca sarvair aham eva vedyam (BG 15.15). And what is the purpose of the Vedas? Why Vedic knowledge is perfect? Because it is spoken by God. God is perfect, and whatever He speaks, that is perfect. Therefore God is called "God is good." All-good. Whatever He does, whatever He speaks, everything is good, perfect.
So we are receiving knowledge of this transmigration of the soul from God, Kṛṣṇa. Therefore, it is perfect. He says, dhīras tatra na muhyati. After the death of a person, one should not be bewildered. He should be dhīra, he should be sober to know how things are happening. That is called knowledge. Now, after the passing of the soul from this body, how the soul accepts another body? That also you learn from the Supreme Personality of Godhead, Kṛṣṇa. We can see with our material eyes this gross body, the gross covering made of earth, water, fire, air, ether. But there is another covering. What is that? Mind, intelligence and ego.
So you cannot see mind, you cannot see intelligence, neither you can see ego, and what to see about the soul? The soul is still finer. The dimension of the soul is mentioned in the Vedas: keśāgra-śata-bhāgasya śatadhā kalpitasya ca (Śvetāśvatara Upaniṣad 5.9). Just the tip of your hair you divide into one hundred part, and again take that one-hundredth part and divide again into another hundred part, that means one ten-thousandth part of the tip of hair is the length and breadth of the soul. So how you can see?