Be diligent in these things. Give yourself wholly to them, that your progress may be revealed to all.
How old was Timothy? Well, he had been with Paul now traveling as a companion for fifteen years. Assuming that he was fifteen years old when he started out with Paul, and that's probably a little young, but let's say that he was only fifteen, he's at least thirty years old now. So he's not just a kid. When Paul said, "Let no man despise your youth," you shouldn't be thinking of some fifteen, sixteen-year-old kid. Timothy is probably thirty or more at this particular point. But when the elders were not really considered elders until they became fifty, there was that tendency to look down upon a younger man as lacking in the wisdom that comes from age and maturity. So "let no man despise your youth,"