Eunuch

A eunuch (Isaiah 56:3, 5) denotes the natural man as to good, and the "son of the stranger" denotes the natural man as to truth.

In Matthew 19:12, this signifies people who are subjects of the celestial marriage.

Isaiah 56:3

³ Neither let the foreigner, who has joined himself to Yahweh, speak, saying, "Yahweh will surely separate me from his people;" neither let the eunuch say, "Behold, I am a dry tree."