Prabhupāda: That is our Vedic evidence. Whenever we speak something, immediately quote from Vedas. This is our process. If it is accepted by the Vedic process, then it is perfect. Just like in the law court. You are lawyer. You are arguing. When you quote from a judgement, previous judgement, it is accepted. Similarly, when you give authoritative statement support of your talking, then it is perfect. That is the way. Otherwise, what for these books are there? If it is mental speculation what is the use of these books? But as soon as we speak something, we immediately support by quoting from Vedic literature. And that is perfect. And now you have to possess little knowledge. Just like Kṛṣṇa says, how Kṛṣṇa is perfect. Kṛṣṇa is giving example side, by side. Yathā, dehino 'smin yathā dehe (BG 2.13). Asmin dehe, as there is the soul, there is the soul, asmin dehe, and he's having different types of bodies, kaumāraṁ yauvanaṁ jarā. He's changing body from childhood, boyhood, boyhood to youth-hood, youth-hood to another state. Tathā dehāntara-prāptiḥ. Where is the illogical presentation? This is scientific. For an intelligent man, this is scientific. And if he's still dull-headed, then what can be done? Kṛṣṇa gives example. Tathā dehāntara-prāptiḥ. As the soul is changing body, from babyhood to childhood, childhood to boyhood, boyhood to youth-hood, like that. Similarly, after finishing this body, it may be invisible to you, but the subtle body is there. We have got two kinds of bodies. Bhūmir āpo 'nalo vāyuḥ khaṁ mano buddhir eva ca (BG 7.4). This material, eight kinds of materials—earth, water, fire, air, sky, mind, intelligence, ego. So when your body of earth, water, fire, air... Now in the... Now here is a medical man. He knows about this body made of earth, water, fire, air.