There is much in our lives that depends upon suggestions, suggestions which come from outside, either consciously or unconsciously, as well as suggestions which come to us from ourselves. The superstitions which existed in ancient times and which still exist in some countries tell us something of the psychology of suggestion. If a person saw a certain bird, a certain animal, before beginning his work, that impression affected his work. If a man, when starting some business or industry or new enterprise, met with an unpleasant incident or a disagreeable person, naturally this brought him ill luck. On the other hand, if he encountered desirable conditions and people with a good influence his whole life might be changed. People called this superstition; in fact it is a science, it is the psychology of impressions. It is in accordance with every impression which is made on us that our life works.