as newborn babes, long for the pure milk of the Word, that you may grow thereby,
Long for the spiritual milk which is without guile ...  There are two changes from the KJV in this verse: (1) the addition of the words "thereby unto salvation," which is a very wholesome change, and (2) the substitution of this clause for "desire the sincere milk of the word," which in no sense improves the meaning; for as Hunter pointed out, "belonging to the word" is a thought surely contained in the Greek.[5] In fact, he said, "The King James is preferable, the milk of the word, the word being the gospel.[6] This is the first of a number of instances in this chapter where the KJV is definitely superior to the subsequent versions.