"No wild enthusiast could rest, till half the world like him was possessed"

This quote by William Cowper speaks with the power of enthusiasm and its capability to spread. It suggests that when somebody is enthusiastic about something, they will not be content up until they have shared their interest with others. This could be analyzed as a call to action, encouraging individuals to share their passions and interests with the world. It could likewise be viewed as a caution, suggesting that when someone is too passionate about something, they may end up being excessively zealous and try to force their beliefs on others. In either case, the quote stresses the infectious nature of enthusiasm and its possible to affect the world. It suggests that when someone is enthusiastic about something, they should not be afraid to share it with others, as it might have a powerful and far-reaching impact.