Life consists of a continual struggle for gain, of whatever kind it may be. Gain seems to be the purpose of life and it is accomplished by mastery, and this proves that one naturally must try to gain whatever seems to be good and attainable in life or whatever one needs in life; when one is able to attain it, it shows mastery, and when one is unable, it shows the lack of it. But by a still deeper insight into the subject one sees that every gain a person has in view limits him to a certain extent to that gain, directs his activities into a certain channel, and forms the line of his fate. At the same time it deprives him of a still greater or a better gain and of the freedom of activity which might perhaps accomplish something still better.