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Teachings of Lord Chaitanya
Spiritual Master. That is the system. If you want to know that which is inconceivable, you must accept the disciplic succession. Because the knowledge is coming down from the Supreme, down, down, down—it is perfect. Suppose a hundred generations before, there was something confidential that your forefather told his son, which has finally been passed down to you. Although you are not in touch with the direct personality, yet because it is coming through disciplic succession, the same truth is expressed.
How was Brahma informed of this sort of knowledge? That is also stated in the  Srimad Bhagwatam : The original learned scholar is Brahma; and Krishna, the Supreme Absolute Truth, the Personality of Godhead, impressed transcendental knowledge into the heart of Brahma.  By the heart . So two processes of knowledge exist: One process depends upon the Supreme Personality of Godhead as the Supersoul seated within you. He informs you. And  He also expands Himself as the Spiritual Master . The Guru also informs you.
So in both ways, from within and from without, the information is transmitted. We simply have to receive it. If we receive knowledge in this way, it doesn't matter that it is inconceivable. In the  Bhagwatam , you will find much information about the  Vaikuntha  planetary systems, which are beyond the material Universe. Just as with  Chaitanya Charitamrita , the knowledge is there, and you simply have to take it. But you have to receive it by the  Parampara  system. You cannot approach the Truth, which is inconceivable to your experimental knowledge. It is not possible. We want to know everything by experimental knowledge. That is foolishness. It is not possible. According to the Vedic way, sound is evidence. Sound is very important in Vedic understanding. Sound is evidence, if the sound is pure. In the material world, also, you understand things thousands of miles away simply by sound vibration. As soon as you call by telephone or radio, there is sound. In San Francisco, 3000 miles away, as soon as you receive the sound—“Mr. Such-and-Such speaking”—you understand. The evidence is sound. Where is the informant, is he standing there before you? No—but as soon as you hear the sound you know. Sound is the most authoritative evidence. These things are received by sound vibration.
We have the information that beyond this cosmic manifestation there are the very extensive  Vaikunthas . This material manifestation is only one-fourth of the manifestation. There is not only this Universe, but there are innumerable Universes. Just as there are innumerable planets within this Universe, so this is only one Cosmos; there are innumerable Universes, and, all combined together they are one-fourth of the manifestation of the Crea-