Brotherhoods such as the Stoics instilled in their initiates the concept of chreston megiston, summum bonum or the "Highest Good," which was the "ethical objective of devout Pagans, and more particularly of such as were of the Stoic persuasion, among whom χρηστὰ ᾔθη [chresta ethe or "good ethics"] was a familiar expression." (Mitchell, 36) Interestingly, this precise brotherhood or mysteries-school expression of "good ethics" can be found in the New Testament epistle 1 Corinthians (15:33):

μὴ πλανᾶσθε Φθείρουσιν ἤθη χρησθ᾽ ὁμιλίαι κακαί

Be not led astray: Bad homilies [moralizing discourses] corrupt good ethics.

In this regard, it has been surmised many times that the apostle Paul, who purportedly spoke these words, was an initiate into one or more brotherhoods and mystery schools, including Gnosticism. His home city of Tarsus in Asia Minor was a seat of the Mithraic mysteries, among others, and there exists a significant amount of Mithraic thought in his writings.