Which of the following is a key teaching found in the Gospel of Matthew?

The Sermon on the Mount is a key teaching in the Gospel of Matthew, specifically found in chapters 5 through 7. This section of the Gospel presents some of the core values and ethical teachings of Jesus, including the Beatitudes, teachings on love, prayer, and the nature of true righteousness. It encapsulates the heart of Jesus' message and serves as a foundational text for Christian ethics, emphasizing themes such as humility, mercy, and peacemaking.

In contrast, the story of the Good Samaritan is found in the Gospel of Luke and focuses on themes of compassion and neighborly love. The Prodigal Son is also a parable unique to Luke, illustrating themes of forgiveness and redemption. The Great Commission, which encompasses Jesus' directive to make disciples of all nations, is indeed significant, but it is presented at the end of Matthew and serves a different purpose than the comprehensive ethical teaching found in the Sermon on the Mount. Thus, the Sermon on the Mount stands out as a cornerstone of Jesus' teachings within Matthew's narrative.