CORE ETHICAL TEACHING:
Major source of ethical guidance for Christians is the NEw Testament which contains the Gospels. Additionally, the Ten Commandments, contained in the Old Testament, also known as the Decalogue are an important source of ethical guidance for Christians.
Importance of the 10 Commandments
The 10 Commandments are a succint summary of Christian eithics. They are frequently used as a framework for the key principles of Christian ethics. Jesus also used them as a means to highlight the requirements of the new covenant.
Beatitudes
Regarded as a foundational passage for Christian eithics, they describe a life directed towards sintliness and holiness. Thus, the Beatitudes provide a model or a template for the Christian life. They point to an inversion of values whereby the things that are often regarded as having no value according to the dominant culture are celebrated and affirmed in the reign of God. In another sense they provide a warning against an approach to life which values only material strength and power.
These tachings provide guidance which enable to adherents of Christianity to make informed moral choices according to the principles of the tradition.
Hope this kinda helped...