What is the difference between the Qur'an and Hadith in terms of their significance and authority in Islamic teachings?

The Qur'an is the holy book of Islam, believed to be the literal Word of God as revealed to the Prophet Muhammad. It holds the highest authority in Islamic teachings. Hadith, on the other hand, are the sayings, actions, and approvals of the Prophet Muhammad and his companions. While Hadith are important for understanding and interpreting the Qur'an, they are considered secondary in authority compared to the Qur'an.