The word “you” was both second person plural, and a formal way of addressing a single person, like in many European languages now. Over time, formal addresses were used in English more and more. Eventually, it was the only normal way to speak, and slipping back into thee/thou/thy became overly casual in a rude way.
Standard English just doesn’t have a second person plural now. In the southern US “y’all” has emerged as a replacement. There are a few UK dialects that retained thou the whole time, as well.
The King James bible translation is old, and used deliberately old-fashioned language even for the time. Do with that what you will.
The word “you” was both second person plural, and a formal way of addressing a single person, like in many European languages now. Over time, formal addresses were used in English more and more. Eventually, it was the only normal way to speak, and slipping back into thee/thou/thy became overly casual in a rude way.
Standard English just doesn’t have a second person plural now. In the southern US “y’all” has emerged as a replacement. There are a few UK dialects that retained thou the whole time, as well.
The King James bible translation is old, and used deliberately old-fashioned language even for the time. Do with that what you will.