John Chrysostom (attributed)

Or; The streets are all the professions of this world, as philosophy, soldiery, and the like. And therefore He says, Go out into the crossings of the streets, that they may call to the faith men of every condition. Moreover, as chastity is the way that leads to God, so fornication is the way that leads to the Devil; and so it is in the other virtues and vices. Thus He bids them invite to the faith men of every profession or condition.