Strabo Geography 10.3.9

[9] But I must now investigate how it comes about that so many names have been used of one and the same thing, and the theological element contained in their history. Now this is common both to the Greeks and to the barbarians, to perform their sacred rites in connection with the relaxation of a festival, these rites being performed sometimes with religious frenzy, sometimes without it; sometimes with music, sometimes not; and sometimes in secret, sometimes openly. And it is in accordance with the dictates of nature that this should be so, for, in the first place, the relaxation draws the mind away from human occupations and turns the real mind towards that which is divine; and, secondly, the religious frenzy seems to afford a kind of divine inspiration and to be very like that of the soothsayer; and, thirdly, the secrecy with which the sacred rites are concealed induces reverence for the divine, since it imitates the nature of the divine, which is to avoid being perceived by our human senses; and, fourthly, music, which includes dancing as well as rhythm and melody, at the same time, by the delight it affords and by its artistic beauty, brings us in touch with the divine, and this for the following reason; for although it has been well said that human beings then act most like the gods when they are doing good to others, yet one might better say, when they are happy; and such happiness consists of rejoicing, celebrating festivals, pursuing philosophy, and engaging in music; for, if music is perverted when musicians turn their art to sensual delights at symposiums and in orchestric and scenic performances and the like, we should not lay the blame upon music itself, but should rather examine the nature of our system of education, since this is based on music.