As a kid, I would struggle with this, and would constantly express my emotions in unhealthy ways. High school football was the best thing that could have happened to me. Learning healthy ways to deal with strong emotions is a life skill that many take a lifetime to learn.
Football in the case of emotion, your view speak volume in me has taught be to be persistent is pursuing if anything , it make me realize you can win today and loose tomorrow if one relent effort but can still win when the effort is made efficient lesson to football hass allot mostly the area of been indomitable if you continue to work hard and cherish the team, but one major thing I don't forget is that you can't do it alone team work make it easier even in life one person can't leave on earth so is in other sphere of life team work is what makes it effectual.
You forgot loyalty!!.