On the other hand, anger stops digestion and poisons the secretions of the body. Worry does the same. It takes the mind from constructive thoughts and deeds and centers it upon ourselves. An effective mind must be tranquil, otherwise it upsets the body and fails to give proper direction to our activities. For a real life success we need a proper perspective. We need to be balanced, poised, adjusted. Most of us are too circumscribed mentally. We live so much by and for ourselves that we consider ourselves, individually, of greater importance than the facts warrant. Others do not agree with us on this point, and this is a source of disturbance. I am personally acquainted with two surgeons and several physicians who think they are the greatest in the world, and one considers himself the best physician of all time. The rest of the world does not appraise them so highly, and some of these professional men are very much annoyed because of this lack of appreciation. Selfishness and self-esteem to a certain point are virtues. Beyond that point they become vices. Certainly we should think well of ourselves, and then act so that this good opinion is merited. Self-interest and selfishness are the main-springs of progress. Most of us need some inducement to do good work. It is well that it is so. The ones who deserve the great rewards generally get them, whether they are mental or physical. To obtain a proper perspective of ourselves we must learn to think independently and honestly. It is too common to be conventionally honest, but dishonest with ourselves. It is too common to pass unnoticed in ourselves the faults we condemn in others. We should be lenient in our judgment because often the mistakes that others make would have been ours had we but had the opportunity to make them. As physical ills are principally caused by bad physical habits, so are mental ills and inefficiency chiefly due to various bad mental habits, which are allowed to fasten themselves upon us. These will be briefly discussed so as to focus attention upon them, for the first thing necessary for the correction of a bad habit is to recognize its presence. It is as important to think right as it is to give the body proper care. A good body with a mind working in the wrong direction is of no use. If we allow our minds to be disturbed and distressed by every little unfavorable happening, we shall never have enough tranquility to think well.