The KJV (and others) have wrongly rendered the Greek adjective, "monogenes" by our English, "Only Begotten", in verses like John 1:14,18; 3:16, 18,etc. This error has given rise to some very heritical teaching on the Person of Jesus Christ, like that which is known as "The Eternal Generation of the Son from the Father". The reading "Only Begotton" has more to do with "theology", that the correct rendering of the Greek. The Greek word "monogenes" is from, "mono", which is "only", and "genos", which is, "kind". Literally the meaning is "one of its kind", or, in the case of Jesus Christ, "unique" The doctrine of the Eternal Generation of Jesus from the Father, has a long history, and can be traced back to the early Church heretic, Origen, who lived in the second century. One of Origen's many heresise, was that the substance of Jesus Christ was "different" to that of the Father, thereby making Jesus a "second god". Origen was condemned for this and other heresies. However, some of the Orthodox party adpoted some of Origen's teachings on the Person of Jesus Christ. Thus, in the famous Nicene Creed, we read: "God of God, Light of Light, Begotten not created, etc". This may "look" as being Biblical, but is you were to study the background of this Creed, you will see that it actually teaches a "Subordination of Person", not "office", of Jesus Christ, to God the Father, thereby making the Father superior in Person, and therefore, in nature, to Jesus as the Son. This "thinking" has now been taught by many in the Church today, and, based on the reading of the KJV's "Only Begotten", has been accepted without any questions asked! The Truth sall set us free!