And God said, “Let the waters under heaven be gathered into one place, and let dry land appear”; and so it was done. — Genesis 1:9
When we learn that we have an inner self and an outer, and that truth and goodness come from the inner self—or rather from the Lord by way of the inner self into the outer, even though this is contrary to appearances—this information, this knowledge of truth and goodness, is stored away in our memory.
The knowledge takes its place among the secular facts we have learned, because anything instilled in our outward memory, whether earthly, spiritual, or heavenly, lodges there as a fact, and from there the Lord draws on it.
This knowledge is the waters gathered into one place and named seas. The outer being itself, on the other hand, is called dry land. Immediately afterward it is called earth, as the next verse shows.
from Secrets of Heaven, Volume 1, Section 27