Final answer:
The Sermon on the Mount, found within the Gospel of Matthew, chapters 5 to 7, is the most concise and direct collection of Jesus's teaching in the New Testament.
Step-by-step explanation:
The most concise and direct collection of Jesus's teaching is found in the Sermon on the Mount in the New Testament. This is largely contained within the Gospel of Matthew, chapters 5 to 7, which are a part of the Christian Bible. The Sermon on the Mount includes a number of Jesus's teachings, such as the Beatitudes, the Lord's Prayer, and instructions on love and the law, which encapsulate core aspects of his moral and ethical teachings. Additionally, the Gospels of Mark, Luke, and John also provide accounts of Jesus's life and words, contributing to the understanding of his teachings and their impact on Christian doctrine. While interpretations of these teachings can vary, they remain central to Christian belief and are key to understanding the message Jesus sought to convey to his followers.