Prabhupāda: So Kṛṣṇa has got two kinds of existence: prakaṭa and aprakaṭa. Prakaṭa means when you see Kṛṣṇa personally. When Kṛṣṇa is present on this planet, everyone can see Kṛṣṇa. And actually, everyone saw. But only the devotees could understand that "Here is the Supreme Personality of Godhead." So that is called prakaṭa, "physically present." And there is another phase, which is called aprakaṭa, "not physically present." But that does not mean Kṛṣṇa is dead or God is dead. That does not mean. Prakaṭa or aprakaṭa, physically present or not present, it doesn't matter.
So after all, He is adhokṣaja. This word is used, adhaḥ. Adhaḥ means subdued. And Akṣa, akṣa means eyes or senses. Akṣaja. Ja means generated. So our senses are there—eyes, ears, hands, legs, nose, so many. Ten senses are there. So we are acquiring knowledge, generated. Knowledge is generated from the senses. But so long our senses are materially contaminated, we do not get real knowledge. We have to acquire knowledge through the senses, but unless our senses are purified, we do not have real knowledge. So we cannot appreciate or understand God, His form, His name, His quality, His pastime, His entourage, nothing of them we can understand by our these present material senses. That is not possible. Therefore His name is Adhokṣaja. Adhaḥ. Adhaḥ means cut (curbed) down. You cannot approach the Supreme by your these blunt material senses. That is not possible. Therefore His name is Adhokṣaja. Adhah-kṛta akṣaja-jñānaṁ yatra. The adhokṣaja means... Jñāna means experimental knowledge. Just like these modern scientists, they believe in experimental knowledge. But they are so rascal, in their own case, they will say, "Yes, we are trying. In future it will be successful." Why not experimental knowledge now? If you say that life is generated from matter... You are writing so many books and getting Nobel Prize. Why not by experimental knowledge prove that "Here are some matters and chemicals and here is life"? That they say, "We are trying." This is their escape. But actually, science means two things: observation and experiment. If you do not experiment practically in the laboratory, simply observation is not sufficient. That is not science. That is theory.