Whenever I fed the mice or weighed them for the lever-press task, I always thought of Jesus in the upper room, washing his disciples’ feet. This moment of servitude, of being quite literally brought low, always reminded me that I needed these mice just as much as they needed me. More. What would I know about the brain without them? How could I perform my work, find answers to my questions? The collaboration that the mice and I have going in this lab is, if not holy, then at least sacrosanct.