Personal Pronouns

I am certainly not a linguist but have been a student of popular and Biblical literature for almost 50 years. While in college I took two one semester courses in Spanish. In them I learned that in Spanish pronouns may have a “familiar” or “formal” style. For the pronoun “you” in Spanish one must choose to say  ”su” (formal) or “tu” (familiar”). English used to have similar usages but in current English we always use the “formal” pronouns.

Quaker Christians used to speak to and of both God and friends by using the “familiar”
form of personal pronouns. Therefore rather than saying “you” and “your” they would say “thee”, “thou” and “thine”. Most all Christians expressed the personal/close relationship God has with those who love and obey God by addressing God in the “familiar” form, praying “Thee”, “Thou”, “Thy”, and “Thine”. In recent years people have come to believe that such usage is more formal and respectful but in using language that way they have turned past usage “on its ear”