During difficult times I often turn to a gospel song called “Stand.” In it, songwriter Donnie McClurkin sings, “What do you do when you’ve done all you can, and it seems like it’s never enough? What do you give when you’ve given your all, and it seems like you can’t make it through?” The answer lies in McClurkin’s simple refrain: “You just stand.” That’s where strength comes from—our ability to face resistance and walk through it. It’s not that people who persevere don’t ever feel doubt, fear, and exhaustion. They do. But in the toughest moments, we can have faith that if we take just one step more than we feel we’re capable of, if we draw on the incredible resolve every human being possesses, we’ll learn some of the most profound lessons life has to offer. What I know for sure is that there is no strength without challenge, adversity, resistance, and often pain. The problems that make you want to throw up your hands and holler “Mercy!” will build your tenacity, courage, discipline, and determination.