To screen out people who are not sincere to inherit Father1s words. Unless you can speak Korean, your descendants may not be able to be intermarried with Father's lineage. Father's great-grandchildren will be able to intermarry. Our greatest hope is to be connected with the vertical lineage. One language, one culture.
Culture is formed through one language.
Culture of heart and communication of heart, not verbal. But we need a means of language for verbal communication. It is hard to understand American jokes even if you live here twenty years. You miss the essence of Father's message, and you will regret it in spirit world. A lifelong goal of Father's is unification of language.