Stay away from negative thought and influence of other people, protect yourself against this evil

Without doubt, the most common weakness of all human beings is the habit of leaving their minds open to the negative influence of other people. This weakness is all the more damaging, because most people do not recognize that they are cursed by it, and many who acknowledge it, neglect or refuse to correct the evil until it becomes an uncontrollable part of their daily habits.

Unfortunately, there is no legal protection against those who, either by design or ignorance, poison the minds of others by negative suggestion. This form of destruction should be punishable by heavy legal penalties, because it may and often does destroy one's chances of acquiring material things which are protected by law.

You can easily protect yourself against highway robbers, because the law provides organized cooperation for your benefit, but the “seventh basic evil” is more difficult to master, because it strikes when you are not aware of its presence, when you are asleep, and while you are awake. Moreover, its weapon is intangible, because it consists of merely—a STATE OF MIND. This evil is also dangerous because it strikes in as many different forms as there are human experiences. Sometimes it enters the mind through the well-meant words of one's own relatives. At other times, it bores from within, through one's own mental attitude. Always it is as deadly as poison, even though it may not kill as quickly.

To protect yourself against negative influences, whether of your own making, or the result of the activities of negative people around you, recognize that you have a WILL-POWER, and put it into constant use, until it builds a wall of immunity against negative influences in your own mind.

—Napoleon Hill