(Clearwisdom.net)
In the section "Energy Field," of Lecture Three in the book Zhuan Falun, Teacher says, "We teach salvation of both ourselves and others, as well as of all beings. Thus, Falun can save oneself by turning inward and save others by turning outward. While turning outward, it gives off energy and can benefit others. This way, within your energy-covering field others will benefit, and they may feel very comfortable. Whether you are on the street walking, in the workplace, or at home, you can have this effect on others. People within your field may unintentionally have their illnesses healed since this field can rectify all abnormal conditions. A human body should not become ill, and being ill is an abnormal state. It can rectify this abnormal state. When an evil-minded person is thinking of something bad, this person might change his mind due to the powerful effect of your field; he might then no longer want to commit the wrongdoing. Perhaps a person wants to swear at someone. Suddenly, he may change his mind and will not want to swear. Only the energy field from cultivation practice in a righteous way can produce this effect. Therefore, in the past there was this saying in Buddhism: 'The Buddha-light illuminates everywhere and rectifies all abnormalities.' This is what it means."
Teacher also mentioned, "That's because with our Dafa disciples, if each person cultivates well, then, with every person corresponding to a cosmic body you'll cover the entire cosmos. That's why your sending righteous thoughts is so important." ("Teaching and Explaining the Fa at the Metropolitan New York Fa Conference" -- April 20, 2003)
Thus, I have enlightened to the following principle. Whether the state of everyday people's society is good or bad is directly tied to the xinxing [mind or heart nature, moral character] of each and every Dafa practitioner. If all of us can have a calm mind, study the Fa well, and do the three things taught by Teacher, then everything in everyday people's society will improve. This is because the energy field of Dafa cultivators can rectify all abnormal states, affecting everyday people's society and truly achieving the status of "the Buddha-light illuminating everywhere and rectifying all abnormalities." This can only be accomplished by practitioners who have reached the standard through self-cultivation. This is just like what Teacher said -- "Only the energy field from cultivation practice in a righteous way can produce this effect."
If Dafa practitioners understand this point and realize the responsibility of Fa-rectification disciples toward Dafa and all sentient beings, yet still cannot require themselves to maintain a calm mind and study the Fa, and still not do what Dafa disciples need to do, this would be a sin against Dafa and all beings.
We must not retain human concepts and notions and apply emotion or zeal to anything concerning Dafa, Fa-rectification, or salvation of sentient beings. Otherwise, our weakness may easily be exploited by the old forces and evil demons to cause damage to the integral image of Dafa. The above is my personal understanding. Please point out kindly if there is any deficiency.