Enthusiasm is never a matter of chance. There are certain stimuli which produce enthusiasm, the most important of these being as follows: Occupation in work which one loves best. Environment where one comes in contact with others who are enthusiastic and optimistic. Financial success. Complete mastery and application, in one's daily work, of the Fifteen Laws of Success. Good health. Knowledge that one has served others in some helpful manner. Good clothes, appropriate to the needs of one's occupation.