The Sermon on the Mount portrays repentance (metanoia, the total change of attitude) and the righteousness that belong to the kingdom. That is, it describes what human life and community look like when they are under the reign of God's grace. And what do they look like? Different! Jesus emphasized that his true followers, the citizens of God's kingdom, should be completely different from others.
The Sermon on the Mount is characterized by faithfully expounding the biblical text and relating it to contemporary life. It is based on the New International Version and refers to other Bible translations.