I think it's definitely strong enough, and just the fact that you were chosen out of all those people proves it. The fact that you were the youngest, says a lot about your drive and determination, and also how serious you are, and have been, about your studies and your life. Your last sentence is great, and very important too, because it shows that you realize you still have things to learn and are willing to change your way of thinking about some things. This tells me that as a leader, you'll be compassionate and thoughtful. Good qualities!