gospel
A Christian message or writing believed to be true and important.
Gospel means different but related things, all connected to the idea of truth or good news.
In Christianity, the four Gospels (Matthew, Mark, Luke, and John) are the books of the New Testament that tell the story of Jesus's life and teachings. Christians consider these accounts fundamentally true and important, which is why the word took on its broader meaning.
Today, when someone says they take something “as gospel,” they mean they believe it completely and without question. If your friend insists that a certain study method works and won't consider any alternatives, she's taking that advice as gospel. This usage suggests both total belief and, sometimes, a warning that it can be unwise to accept every claim as absolute truth.
The word also describes a style of music called gospel music, which grew out of African American church traditions in the early 1900s. Gospel music combines powerful vocals, emotional expression, and religious themes. Artists like Mahalia Jackson and modern performers continue this tradition, and gospel's influence has shaped rock, soul, and R&B music.
When someone says “that's the gospel truth,” they're insisting that what they're saying is absolutely, positively true. The phrase emphasizes certainty and honesty, though people sometimes use it playfully or ironically, too.