시가서 is a collection of poems found in the 성경, specifically in the 구약. It includes five books: 욥기, 시편, 잠언, 전도서, and 아가. These texts express a range of human emotions and experiences, from sorrow and lamentation to joy and love. The 시가서 is significant for its literary beauty and depth, often using metaphor and imagery to convey profound truths. It is studied not only for its religious content but also for its artistic merit, influencing both literature and culture throughout history.