Boston Light, America's first lighthouse, just celebrated its 300th birthday—but Sally Snowman will be the first to let you know some more specifics about what that "birthday" really means. "The original tower built in 1716 was blown up by the British in 1776," she explains. "We have the new one."

Sally Snowman mans—or "womans," in her words—the lighthouse, serving as its 70th keeper (and the first female to have the title). Over the three centuries since its inception, a keeper has kept the light burning; however, the position in 2016 looks markedly different from those who held the role in the 18th century. As the lighthouse is now "fully automated," Snowman "maintain[s] the grounds, giv[es] tours and manag[es] 90 volunteers."

Yet even with these modernized tasks, Snowman realizes the significance of her job: "Here I am in 2016, the keeper for our 300th anniversary," she says. "That's way beyond my wildest dreams."

Possible Preaching Angles: The various roles within the body of Christ—missionary, teacher, preacher, etc.—look drastically different within various contexts: whether historical eras or cultural circumstances. The importance and the purpose of those roles, however, has remained constant since Jesus' command to "go and make disciples of all nations" (Matt. 28:19).