Here we find Kevin with his companion and 14-year-old Jonathan who was baptized. Kevin was pleased that his newbie companion would have the opportunity to perform the baptism.
Missions bring ups and downs. Not long ago, Kevin was experiencing a down. Now he seems to be in the midst of an up. He reports that they have two solid baptisms scheduled for April. His specific quote was, "Estamos echando fuego aqui en este barrio..." I think the phrase "echando fuego" must be something of an idiomatic phrase. The literal translation would be something like "casting or throwing fire." In any event, I think it is meant to be positive.