From the introduction: Humans acquire knowledge in four ways: firstly, through the senses (i.e. physical experience of the material world); secondly, through reading or hearing the speech of another (i.e. learning from a book or a teacher); thirdly, through intuition from the stock of genetic imprints shared throughout our species (i.e. instincts or possibly race-memories); and fourthly, through what is termed "scrying" (i.e. serving as vessels for leakages through the fabric of the Many Planes). To these, some might add a fifth path of gaining knowledge: direct communication from some greater being.