In the seventh lesson in Law of Success, Napolean Hill discusses the great importance of “enthusiasm”, and how integrating enthusiasm into your life will ultimately lead to success. Hill defines enthusiasm as a state of mind that inspires and arouses one to put action into the task at hand." By constantly engaging in life with enthusiasm, the characteristic can be developed and used as a vital force in the work environment. In order to develop this potential enthusiasm, Hill argues that you must do the kind of work that you like, and make sure your actions are leading toward the achievement of your definite chief aim. Enthusiasm is a contagious characteristic, which magnifies its power. That is, it makes a large enough impression on others in order to make them become enthusiastic as well. Enthusiasm can mean using the same word choice but stated in a different manner, as people become more or less motivated based on how something is said to them. Hill emphasizes this fact, as it is not so much what you say as it is the tone and manner in which you say it that makes a lasting impression.
In order to truly master the quality of enthusiasm, Hill stresses the idea of working for something that you believe in. This will naturally bring out the enthusiastic quality in yourself, as you will be legitimately interested in what you are doing. In his example, Hill discusses how he turned down the most money that was ever offered to him simply because he did not believe in what he was doing. The job was to write articles on a topic that he opposed, and therefore knew he would not be giving his best enthusiastic effort when taking the time to write the articles. When working in an environment or on a project that you genuinely enjoy and believe in, the enthusiasm will begin to come on its own.