Service is not just helping another person in an hour of need, but rather it is helping another in any hour, ignoreing our own selfish gains from taking up the act. In this sense, therefore, service cannot by meaning, by compulsory.
LaFrance, Adrienne M.
"Obligatory service is not service,"
Reason and Respect:
2, Article 2.
Available at: http://docs.rwu.edu/rr/vol3/iss2/2