In 2003, a hiker performed "self surgery." He cut off his arm to save his life. Seemingly, in this Gospel reading, Jesus calls us to do "self surgery" as well. What REALLY does He mean when He calls us to "cut off" a hand or foot, or to "tear out" an eye if one of these causes us to sin? We consider these questions in this service. Sermon title is "Surgery on One's Self" based on Mark 9:38-50.