Driven by greed to have and to hold people steal and cheat with little thought of the result. Honesty and integrity in all our dealings as worker, employer, consumer or citizen are the only basis for true happiness. The Third Precept is to refrain from sexual misconduct. This means in detail not to indulge in sexual relations with a married person or an underage person. The married person should be like a monk or nun with all other men and women except their partner.
Adultery creates pain and distress and is the wrecker of families.
In general our culture is far too promiscuous and indulgent in matters of sex and the result of this moral chaos is broken homes, venereal disease, the horror of abortion and other evils. The Fourth Precept is to speak always the truth. When you lie you are creating a state of delusion in someone else's consciousness which is a terrible thing to do. We should value the truth as precious and refrain from laying at all times. Besides lying, also divisive speech, hurtful speech and foolish babbling are condemned by the Buddha.