Why did Johann Sebastian bach leave his brothers house at 15?

Johann Sebastian Bach left his brother's house at the age of 15 to pursue his education and musical career. His brother, Johann Christoph Bach, was a musician who provided him with some initial guidance, but Bach sought further opportunities to develop his skills. He later moved to Luneburg to attend a prestigious school, where he was exposed to a broader musical environment and could refine his talents. This move was crucial for his eventual success as a composer and musician.