Although Sunīti was an instructor to Dhruva Mahārāja, she could not go to the forest because she was a woman, nor could she execute austerities and penances as Dhruva Mahārāja did. Still, Dhruva Mahārāja was able to take his mother with him. Similarly, Prahlāda Mahārāja also delivered his atheistic father, Hiraṇyakaśipu. The conclusion is that a disciple or an offspring who is a very strong devotee can carry with him to Vaikuṇṭhaloka either his father, mother or śikṣā- or dīkṣā-guru. Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura used to say, "If I could perfectly deliver even one soul back home, back to Godhead, I would think my mission—propagating Kṛṣṇa consciousness—to be successful." The Kṛṣṇa consciousness movement is spreading now all over the world, and sometimes I think that even though I am crippled in many ways, if one of my disciples becomes as strong as Dhruva Mahārāja, then he will be able to carry me with him to Vaikuṇṭhaloka.
(Srimad Bhagavatam--4:12:33--purport).

An unchaste woman is very easily carried away by paramours, and it sometimes happens that her husband is violently killed by her paramours. If the yogī gives his mind a chance and does not restrain it, his mind will give facility to enemies like lust, anger and greed, and they will doubtlessly kill the yogī.
In this verse the word puṁścalī refers to a woman who is easily carried away by men. Such a woman is never to be trusted. Unfortunately, in the present age, women are never controlled. According to the directions of the śāstras, women are never to be given freedom. When a child, a woman must be strictly controlled by her father. When she is young, she must be strictly controlled by her husband, and when she is old, she must be controlled by her elderly sons. If she is given independence and allowed to mingle unrestrictedly with men, she will be spoiled. A spoiled woman, being manipulated by paramours, might even kill her husband. This example is given here because a yogī desiring to get free from material conditions must always keep his mind under control. Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura used to say that in the morning our first business should be to beat the mind with shoes a hundred times. and, before going to bed, to beat the mind a hundred times with a broomstick. In this way one's mind can be kept under control. An uncontrolled mind and an unchaste wife are the same. An unchaste wife can kill her husband at any time, and an uncontrolled mind, followed by lust, anger, greed, madness, envy and illusion, can certainly kill the yogī. When the yogī is controlled by the mind, he falls down into the material condition. One should be very careful of the mind, just as a husband should be careful of an unchaste wife.
(Srimad Bhagavatam--5:6:4--translation and purport).

So actually we are understanding about the sun not by our direct eyes but through the authoritative knowledge, through the śāstra, through the books. Śruti-pramāṇam. That is evidence, śruti-pramāṇam. Śruti means Veda. In the Vedas it is stated... Just like Brahmā. He is receiving Vedic knowledge from, directly from God, Kṛṣṇa. Brahmaṇe darśayan rūpam. This is the process of understanding. Brahmā, how Brahmā is receiving knowledge? Directly he sees there is nobody there, but he is receiving knowledge. Directly he could not see. Upāśṛṇot, upāśṛṇot. Upāśṛṇot: "He simply heard." Upāśṛṇot. Ear, not the eyes. So therefore knowledge has to be gathered by aural reception, not by the eyes. My Guru Mahārāja used to say that, "Do not try to see a saintly person. You try to hear a saintly person." If you see a long beard and very strong man, he is a great sādhu. Oh. That's it." No. You have to hear. What does he speak? Then you understand. Upāśṛṇot. Divyaṁ sahasrābdam.
(Lecture on Srimad Bhagavatam--2:9:4-8--Tokyo--23rd. April, 1972).