25. There ought then to be the joy of the mind, conscious of right, not excited by unrestrained feasts, or nuptial concerts, for in such modesty is not safe, and temptation may be suspected where excessive dancing accompanies festivities. I desire that the virgins of God should be far from this. For as a certain teacher of this world has said: “No one dances when sober unless he is mad.” Now if, according to the wisdom of this world, either drunkenness or madness is the cause of dancing, what a warning is given to us amongst the instances mentioned in the Divine Scriptures, where John, the forerunner of Christ, being beheaded at the wish of a dancer, is an instance that the allurements of dancing did more harm than the madness of sacrilegious anger.
Complete source paragraph · Concerning Virgins, Chapter V., source paragraph 8 · Original source