Instruction and study (1) Language (1) Children (1) Assaying (1) Music (1) Songs and music (1) Music (1) Yarn (1) Thread (1) Teaching (1) Responsibility (1) Profit (1) Necessity (Philosophy) (1) Memory (1) Learning (1) Initiations (into trades, societies, etc.) (1) Initiation rites (1) Authors (1) Songs and music (1) Language, style (1) Analysis (1) Practice (1) Infancy (1) Students (1) Necesidad (Filosofía) (1) Escritores (1) Responsabilidad (1) Beneficios (1) Música (1) Enseignement (1)