I think some people may have already noticed that there is something quite odd in this discussion.

The Iconophile writers of the East (like St. John of Damascus), who had gone to great lengths to carefully distinguish
latreia and
doulia or
proskynesis from each other, but our author never seems to draw a hard line between
adoratio and
adoratio. This is often chalked up to a faulty Latin translation of the acts of Nicaea II (which apparently somewhat confusingly rendered both terms as
adoratio), but at the same time there did not really seem to have been a hard-fast distinction between
veneratio and
adoratio in the Latin of the time.
In 8th-9th century Latin,
adoratio did not necessarily refer just to the adoration reserved for God. For instance, the
Annales regni Francorum describes the “adoration” of Charlemagne following his imperial acclamation in 800. (
Et post laudes ab apostolico more antiquorum principum adoratus est atque ablato patricii nomine imperator et augustus est appellatus. “And after the lauds, he was
adored by the Pope in the manner of the ancient princes, and, discarding the title of ‘Patrician’, he was henceforth known as Emperor and Augustus.”) Even Pope Hadrian, when citing the
Lateran Council of 769 and its condemnation of Iconoclasm, was not too scrupulous in distinguishing between the two terms and used them interchangeably in the context of veneration of images (
Venerari et adorari sacras imagines in eorum concilio censuerunt “they stated that sacred images are to be venerated
and adored;”
Adorari atque venerari sacras imagines statuerunt “they established that sacred images are to be adored
and also venerated”).
As for our author, he argues that God alone is “adored” (
adorandus) and “worshipped” (
colendus), while the saints are but
venerandi, who must be paid nothing more than the veneration which is their due (
opportuna veneratio). However, he himself sometimes also understands
adoratio as an act of respect given to men through gestures like bowing and kissing, although even these are acts employed only as a
salutationis causa, and out of a sense of love or humility.
As we’ve said earlier, the issue was not so much any distinction between
latreia and
proskynesis, but to the objects of
adoratio or
veneratio. The real objection of the Franks, as presented in the
Libri Carolini, was that the proper objects of
adoratio/
veneratio are living beings like God and man, or even the remains of holy men of past ages, whereas images could not be given such honor. You could not even give images the
adoratio given to men because they are lifeless and made by human ands.
Solus igitur Deus colendus, solus adorandus, solus glorificandus est ae de quo per prophetam dicitur: Exaltatum est nomen eius solius. Cuius etiam sanctis, qui triumphato diabolo cum eo regnant sive quia viriliter certauerunt, ut ad nos incolomis status ecclesiae perveniret, sive quia eandem ecclesiam assiduis suffragiis et intercessionibus adiuvare noscuntur, veneratio exhibenda est. Imagines vero omni sui cultura et adoratione seclusa, utrum in basilicis propter memoriam rerum gestarum et ornamentum sint an etiam non sint, nullum fidei catholicae adferre poterunt praeiudicium, quippe cum ad peragenda nostrae salutis mysteria nullum penitus officium habere noscantur.
God therefore alone is to be worshipped (
colendus), he alone to be adored (
adorandus), he alone to be glorified (
glorificandus). Of him the prophet says, “His name alone is excellent,” (Psalm 148:18) Reverence (
veneratio) is likewise due to the saints, who, having overcome the devil, now reign with Christ, because they manfully laboured and suffered, in order that the church should come down to our times, and because they are able to assist the still struggling church with their prayers. But images can only be placed in churches without injury to the faith when adoration (
adoratione) and worship (
cultura) of every kind are forbidden, and when they are employed either simply as ornaments in the basilicas, or as memorials of their deeds; or they may be absent altogether without injury to the Catholic faith, seeing that they can take no part in the mysteries of our salvation.