Gospel according to St. John, 15:13 quoting Jesus at the Last Supper.
It's anonymous. But if it was a John, it was probably the apostle John, writer of the book of Revelation.
So I disagree with your first statement but agree with the second [grin!]
Of equal interest in this discussion on a Sunday is 15:18 - "If the world hates you, know that it has hated me before it hated you." Islam, by its theology, is an uniquely intolerant and exclusionary religion. Indeed, its intolerance so instructs many of its societies that the biggest killer of Muslims is other Muslims!
I was pointing out that John the Baptist did not write it, as he was not the author of the Gospel of John, and since Jesus said it, again it had nothing to do with the Baptist (who IIRC was actually an episcopalian)(a joke)
Islam, by its theology, is an uniquely intolerant and exclusionary religion.
Though I agree with you, be careful here.
Christianity is an intolerant and exclusionary religion. Jesus said so himself.
God is intolerant of sin.
Jesus is the only way to the Father, thus excluding all other "ways".