If we wish to grasp the peculiar character of the great Gnostic movement, we must take care not to be led astray by the catchword " Gnosis."
The actual centre was formed by the Homoii, who only spoke generally of a likeness (6,uotorns) of the Son to the Father; to the left of them were the Anomoii, who, with Arius, held the Son to be unlike WO Amos) the Father; to the right, the Homoiousians who, taking as their catchword " likeness of nature " (6Aot6rrls ear' ou61av), thought that they could preserve the religious content of the Nicene formula without having to adopt the formula itself.
The old catchword, " autonomy of the Hellens," was still heard and indeed was solemnly proclaimed by Nero at the Isthmian games of A.D.
Frequently a popular proverb or catchword in Greek or Latin supplies the designation: thus we have as titles " I've got You " ("Exc.) at); " You don't Know what Evening is to Bring " (Nescis quid vesper serus vehat); " Know Thyself " (FviaOc o-Eavrdv) .
In the catchword Homousios, which had been added to the creed at Nicaea, he too recognized the best formula for the expression of the mystery, although in his own writings he made but sparing use of it.
The most accepted modern theory is that it is merely a catchword surviving from a longer phrase which proclaimed how, during such Indulgences, ordinary confessors might absolve from sins usually " reserved " to the Bishop or the Pope.