Taking any one of these elements, or any of their compounds, all
we know of it is limited strictly to its changes during vibration
through one octave. What happens when the vibration goes above
or below the octave has not yet been treated hypothetically.

While some elements are vibrating on higher and some on lower
keys, we can consider them all as vibrating within one great
octave, that octave of the universal Something which produces
sensual matter, or prakriti.

But matter is not confined, we know, to this great octave,
although our sensual knowledge of it is strictly confined to it.
How do we know it?

Knowledge comes to us in two ways, and there are two kinds of
knowledge.

1. That which comes through our senses, by observation and
experience. This includes reasoning from relation.

2. That which comes through intuition--or, as some writers
inaccurately say, "through the formal laws of thought."

All the observation and experience of the rising and the setting
of the sun for a thousand centuries could only have confirmed the
first natural belief that it revolved daily around the earth;
nor by joining this experience with other experiences could any
deduction have come from our reason that would have opposed it.
Not our reason but our intuition said that the sun stood still
and the earth revolved daily. The oldest books in existence tell