December 18

It is incumbent upon each child to know something of music, for without knowledge of this art the melodies of instrument and voice cannot be rightly enjoyed. Likewise, it is necessary that the schools teach it in order that the souls and hearts of the pupils may become vivified and exhilarated and their lives be brightened with enjoyment. 
- ‘Abdu’l-Baha  (‘The Promulgation of Universal Peace: Talks Delivered by 'Abdu'l-Bahá during His Visit to the United States and Canada in 1912’; The Compilation of Compilations, vol. II, Music)