Is Vicarius Filii Dei Really 666?

VICARIVS FILII DEI, counting only the letters that are Roman numerals (V=5, I=1, C=100, L=50, D=500, U=V=5), sums to 666. That arithmetic is simple fact. What is contested is whether the phrase was ever an official title of the pope. It appears in some historical Catholic documents — most famously a later copy of the Donation of Constantine — but the standard official title is Vicarius Christi, "Vicar of Christ." Catholic apologists have long argued the phrase is not and was not a formal title; some Adventist historians have conceded the evidence is weaker than early Adventist writers assumed.

Revelation 13:18 invites counting the number of the beast, but a name that fits numerically proves little by itself — many names can be made to fit. The identification of the beast in this library rests on the convergence of features in Daniel 7 and Revelation 13: arising from divided Rome, speaking great words against God, persecuting the saints, thinking to change times and law, ruling 1,260 prophetic days, receiving a deadly wound that heals. Those marks either fit or they don't; a Latin phrase adds nothing essential to that case.

Honesty about weak arguments strengthens the strong ones. Where evidence is disputed, we say so.