Just a comment to why the King James use of the thee, thou, etc is very important. In old English, thee, thine, and thou is singular, while ye, you and your are plural. In modern English, "you" can be either singular or plural.
When reading the King James, by understanding thee and ye, I can immediately tell if the pronoun is singular or plural.
In John 3:7, I can immediately tell from the KJV that it is plural or universal. The Lord Jesus is not directing His statement only to Nicodemus, but He is making a universal statement to everyone: "Ye must be born again." You can only tell this from the King James Version.
If you look at the previous verses, you can tell that the Lord Jesus is speaking only to Nicodemus:
John 3:4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be born? (5) Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
Here is the rule: thee, thine, thou are singular.
Ye, you and your are plural.

http://www.kencollins.com/explanations/why-05.htm
Long, long ago, and in a country on the other side of the sea, they made a modern-language translation of the Bible that we call the King James Version or the Authorised Version. Of course, because of the passage of time, it isn’t modern any more. Some of the pronouns have become so archaic that many people don’t know what they mean or how to use them. 
Language changes with time, as you know. When I was little, our teachers used to caution us against saying that things were swell. Shortly after that, swell was replaced by nifty and then by keen. Today, things are neither swell nor nifty nor keen (not even peachy keen), they are neat or cool, or even rad or phat. Most of you can remember such changes, because slang is the part of language that changes the fastest. 
Religious language is the slowest to change. The most familiar example of this is in the Roman Catholic church: at one point in its history it switched from Greek to Latin because that was the language of its people, but it continued to use Latin centuries after it ceased to be a spoken language. (When the Roman Church switched to vernacular languages, it paradoxically became more conservative because that was the reason for changing to Latin in the first place!) 
Back then, the English language had a full set of personal pronouns, and here they are in a handy table. It shows English personal pronouns as they existed at the time of the King James Bible. The ones that differ from today are darker and in italics. 
Singular		Plural	
Subject	Object	Possessive	Predicate		Subject	Object	Possessive	Predicate	
I	Me	My	Mine		We	Us	Our	Ours	
Thou	Thee	Thy	Thine		Ye	You	Your	Yours	
He	Him	His	His						
She	Her	Her	Hers	>	They	Them	Their	Theirs	
It	It	His	His