There is a big difference between intellectual knowledge and spiritual knowledge (gnosis). 
    Intellectual knowledge is about the natural world and the natural universe.  It is gained by reading, attending classes, talking with subject experts, or simply by observation of nature.  This type of knowledge is limited to the physical universe and is often wrong or misleading when it fails to account for the spiritual reality at the root of everything physical.   
    Spiritual knowledge is not about the physical world at all, but about the spiritual levels of existence.  Since it is not physical, it cannot be obtained in the same way nor understood by the same facilities, namely the brain.  Only by awakening our spiritual facilities, our soul, can we understand the spiritual world and the spiritual knowledge that is streaming to us from the Spiritual Sun, which is like a window between the physical and the spiritual, and from the angels and other Beings of Light that occasionally contact us and pass information to us to help us wake up.  And if we want to be among those who are awakened, then we must do whatever we can to prepare for it.