John 5:39 tells you that the scriptures in and of themselves are not eternl life but what the scriptures point to??? or who the scriptures point too.. Jesus has eternal life and he gives it to those who believe in him. Remember John 5:39 Does say that The scriptures testify of him... but you cut that part out for some reason.?
The context sin, so your right and I am wrong because no prophesy of scripture is of any private interpretation. But that doesn't change of principle of 'eternal' which defined not interpreted.
