Today is the Feast Day of St John Damascene, Doctor of the Church, and the Name Saint of my youngest Son, John Matthias Mary. St John is also known as the Doctor of the Assumption because of his writings on the Assumption of Our Blessed Mother, and as John Chrysorrhoas ('streaming with gold') from his eloquence as a preacher. Fitting, since my Name Saint, Jovan Zlatoust, or John Chrysostomos' epithet means 'golden mouthed' for the same reason.
John was a polymath, with interests in law and music as well as theology and philosophy, and if you could see my Son's library, you would realise that choosing John Damascene as his Patron was prophetic. He was also a strong supporter of the Holy Images during the iconoclastic controversy, whence he gained another title, 'Doctor of Christian Art'
Here is a short video on St John from Catholic Online.