And not only are we affected in this way by the thoughts of others, but what is known as "Suggestion" also plays an important part in this matter of sub-conscious influence. We find that the mind has a tendency to reproduce the emotions, moods, shades of thought, and feelings of other persons, as evidenced by their attitude, appearance, facial expression, or words. If we associate with persons of a gloomy temperament, we run the risk of "catching" their mental trouble by the law of suggestion, unless we understand this law and counteract it. In the same way we find that cheerfulness is contagious, and if we keep in the company of cheerful people we are very apt to take on their mental quality. The same rule applies to frequenting the company of unsuccessful or successful people, as the case may be. If we allow ourselves to take up the suggestions constantly emanating from them, we will find that our minds will begin to reproduce the tones, attitudes, characteristics, dispositions and traits of the other persons, and before long we will be living on the same mental plane. As we have repeatedly said, these things are true only when we allow ourselves to "take on" the impressions, but unless one has mastered the law of suggestion, and understands its principles and operations he is more or less apt to be affected by it. All of you readily recall the effect of certain persons upon others with whom they come in contact. One has a faculty of inspiring with vigor and energy those in whose company he happens to be. Another depresses those around him, and is avoided as a "human wet-blanket." Another will cause a feeling of uneasiness in those around him, by reason of his prevailing attitude of distrust, suspicion, and low cunning. Some carry an atmosphere of health around them, while others seem to be surrounded with a sickly aura of disease, even when their physical condition does not seem to indicate the lack of health. Mental states have a subtle way of impressing themselves upon us, and the student who will take the trouble to closely observe those with whom he comes in contact will receive a liberal education along these lines. There is of course a great difference in the degree of suggestibility among different persons. There are those who are almost immune, while at the other end of the line are to be found others who are so constantly and strongly impressed by the suggestions of others, conscious or unconscious, that they may be said to scarcely have any independent thought or will of their own. But nearly all persons are suggestible to a greater or lesser degree.