INTERNAL AND EXTERNAL Know that everything contains an internal and external aspect. Within the larger world, Israel and the descendants of Abraham, Isaac, and Jacob are considered the internal aspect of the world, while the other nations are considered the external aspect of the world. Even within Israel itself, there is an internal aspect, the perfect servants of God, and the external aspect, those who do not dedicate themselves to service of God.
The same is true with the other nations: Their internal aspect is the righteous among the nations, while the external aspect is the vulgar and damaging people and the like. Even among those Jews who serve God, there are those who are internal, in that they are worthy of understanding the internal soul of the Torah and its secrets, and those who are external, who are only involved in the practical aspects of Torah.
Even within an individual Jew, there is an internal aspect, the Israel aspect of him, which is the secret of the “point in his heart,” and an external aspect, which is like the other nations within him; this is the body itself. Yet, even his aspect of “other nations” is like that of a convert. Since it [the Jewish body] is linked to the internal aspect, it is like a righteous convert, who attaches himself to the people of Israel.