Prabhupāda: We are speaking of this Kṛṣṇa consciousness. The message is from the spiritual world. It is not of this material world. Therefore sometimes people may misunderstand. So we have to explain it nicely. Just like they cannot even understand what is the soul. A minute particle of spirit, it is... But they do not understand. Big big scientist, big, big philosophers. But the entire subject matter of Kṛṣṇa consciousness is not of this material world. All it is of spiritual world, but they have no information of the spirit and the spiritual world. Therefore, sometimes they find it very difficult to understand.
August 30, 1973, London