While all Urantia Foundation printings have the article "the" at this point, it seems highly likely that "the" is incorrect, being an inadvertent typographical truncation of "these", which would clarify the meaning of an otherwise obscure sentence.

Original Paragraph:

^{P628:5, 55:4.14} 4. The fourth stage of light and life. On the worlds the Trinity Teacher Sons appear in new roles. Assisted by the creature-trinitized sons so long associated with their order, they now come to the worlds as volunteer counselors and advisers to the Planetary Sovereign and his associates. Such couples -- Paradise-Havona-trinitized sons and ascender-trinitized sons -- represent differing universe viewpoints and diverse personal experiences which are highly serviceable to the planetary rulers.