Our thanks to Rev. D.A. Waite, who gives us this simple explanation in his book, Defending the King James Bible.

The King James Bible, in their use of the pronouns, thee, thy, thyself, thou, thine, ye, you, your, and yourselves, have rendered accuracy a great service. All the pronouns beginning with the letter "T" are singular. All the pronouns beginning with the letter "Y" are plural.

In this way, the English reader can pick up his KING JAMES BIBLE, and, unlike any of the other modern versions, he can tell immediately whether the second person pronoun is singular or plural. For example, look at John 3:7: "Marvel not that I said unto thee, Ye must be born again." If you look at the modern versions, they have the personal pronoun, "you," for both the "thee" and the "ye," thus confusing the meaning.

The Lord is using the SINGULAR ("thee") and then the PLURAL ("ye") in the same sentence, and in the same verse, one word right after the other. There are many other instances where the modern versions obscure the true meaning of the English "you." Is it singular or plural? With your KING JAMES BIBLE in hand, you are NEVER left in doubt. And you don't need to know Greek or Hebrew to find out the answer!