Aristotle tells us that the end of man is happiness and to achieve it practice the virtue. Then the end of virtue is happiness. Another ethical scheme that comes from religions tells us that human behavior must be framed in the fulfillment of the commandments.
Given these schemes man's behavior should be governed by virtue and commandments.
We say that happiness relates to these moral or ethical schemes is an opinionated happiness.
Recall that the opinion is a privation of knowledge. This happiness is opinionated because ignores the existence of ethical rules. These ethical schemes do not consider the effects of erroneous behavior, remember the law: "you reap what you sow." The erroneous behaviors generate suffering, and suffering is the opposite of happiness. The true happiness and not opinionated happiness is that happiness that arise when we work to "minimize the suffering" and this is achieved only by acting in accordance with universal ethical principles: the gold and silver rule. Morality can be confined between human virtue and morality, but ethics deals with the study of good and evil and therefore is based on universal ethical principles and their effects on human behavior.
Let's see some practical cases of application of the Golden Rule:
An example of the Golden Rule or spiritual gift of Rectitude is the Parable of the Good Samaritan (Luke 10:25); There is the Levite and the priest  that sins, and finally the Samaritan who acts with righteousness. None of the three lack any commandment or justice, it is not about "give and receive proportionally" (Aristotle's definition of justice).
Another practical case is when the truth and life are opposed, that is, what happens when to save a life you have to lie. In this case you have to miss a commandment, the fourth. In this case also the golden rule indicates the correct action.
The Golden Rule, The Silver Rule and the Law of Return are the basis of the study of ethics in man, understand the relationship between these rules and human behavior is the basis of all knowledge about human happiness and divine blessings.