What is that eye? Just like a small child. If I say to the small child, so "Sun is there in the sky, and the child will say, "Show me where is the sun." And if somebody says, "Yes, come on, I shall show you sun. Come on the roof. I have got a torch-light." As it is not possible to show the sun at night, although the child is insisting, similarly, the so-called scientists who are claiming that there is no God, they're just like the child. You have to understand. Just like a man who is advanced in knowledge, he knows that sun is there. Although I cannot see at night, but sun is there. He's convinced. Similarly, those who are advanced in spiritual knowledge, they can see God in every moment. Premāñjana-cchurita-bhakti-vilocanena santaḥ sadaiva hṛdayeṣu vilokayanti (Bs. 5.38).
And what is that scientific knowledge? That is very simple. Prema. If you have love of God, then you are qualified to see God every moment. Premāñjana-cchurita-bhakti-vilocanena (Bs. 5.38). When one's eyes are smeared with the ointment of love of Godhead, by that clear eyes... Just like sometimes we use ointment to the eye to see very clearly, similarly, these eyes, these material eyes, are incompetent to see God. These ears incompetent to hear the holy name of God. This tongue is incompetent to chant the holy name of God. Similarly, all the senses, they are, being material. So constitutionally, they cannot see God, they cannot hear of God, they cannot chant of the holy name of God. But it is possible. The śāstra gives you indication.