"You are insane. You require treatment"

Prabhupāda: No. Even they have no common sense... Just like sarva-dughā, what is called, sarva-kāma-dughā mahī. From earth, so many things are coming. The grass is coming, the tree is coming, and animals, they eat grass, they are coming, the human... Everything is coming. So Kṛṣṇa says that the material nature is the mother, because mother is giving birth. So the child is there, the mother is there, and who is the father? You cannot say that without father, a child can be born, or the mother can independently give birth to any offspring. That is not possible. 

So so many living entities are coming from the material nature, and the offsprings are there. Then who is the father? And the father is there. Ahaṁ bīja-pradaḥ pitā [Bg. 14.4]. "I am." So no sane man can deny existence of God. That is not possible. As soon as you deny the existence of God, means you are insane. You require treatment. There is no doubt. This is common sense. So many lives are coming from the earth. Bhūmir āpo 'nalo vāyuḥ [Bg. 7.4].

 Either earth, water, air, there is life. They are coming. And the children are there, mother is there. Should we not inquire who is the father? If you say without father they have come, that is foolishness, madness. Immediately, he's mad. So you cannot deny the existence. If you deny, then you are mad. That is the sign of insanity. They require treatment. That is explained in one Bengali poetry.

piśācī pāile yena mati-cchanna haya

māyā-grasta jīvera haya se bhāva udaya

As a person ghostly haunted, as he speaks all nonsense, similarly, when a living entity becomes bewildered by māyā, he speaks all nonsense.

 Room Conversation Meeting with Dr. Sharma (from Russia) -- April 17, 1977, Bombay