What's the difference between an apostle and a disciple in Christianity?

In Christianity, an apostle is a chosen messenger or ambassador of Jesus Christ, typically one of the twelve disciples who were specifically selected by Jesus during his ministry. A disciple, on the other hand, is a follower or student of Jesus who learns from his teachings and seeks to live according to his example. Apostles have a more specific role in spreading the teachings of Jesus, while disciples are more broadly considered followers of his teachings.