...and is thus said to govern it. As stated earlier, the Residue is governed by the rule of unity. This explains what we mean when we say that the Residue gains from the fact that the Line is concealed within it.
Part 2: Yet it stands outside... The reason why it stands outside is that when the light came to enter into the vessel, not all of it entered. Half of it stands outside, and thus it accomplishes its function while standing in its appointed place – what is within just like that which is outside. These matters are explained further in Part 4 of this proposition.