For every ethical question, some ethical concept or set of concepts directly relevant to the question must be identified. One cannot reason well with regard to ethical issues if one does not clearly understand the force of ethical terms and distinctions. Some of the most basic ethical concepts include honesty, integrity, justice, equality, and respect. In many cases, application of the principles implied by these concepts is simple. In some cases it is difficult.
Consider some simple cases. Lying about, misrepresenting, or distorting the facts to gain a material advantage over others is clearly a violation of the basic principle inherent in the concept of honesty. Expecting others to live up to standards that we ourselves routinely violate is clearly a violation of the basic principle inherent in the concept of integrity. Treating others as if they were worth less than we take ourselves to be worth is a violation of the principles inherent in the concepts of integrity, justice, and equality. Every day human life is filled with clear-cut violations of basic ethical principles. No one would deny that it is ethically repugnant for a person to microwave cats for the fun of it. Nor is it ethically acceptable to kill people to get their money or to torture people because we think they are guilty and ought to confess.