When I was young, I wanted to be a Pilot, but the challenge that I face that hindered not to reach my dream, because teachers in our school were not paying attention to us and never considering our future life as the future generation so they never motivated us in our studies as well as they were teaching us poorly and due to that many students in my school fail a lot especially in science subject and hence my dream to be a pilot die.
The lesson I got from this challenge is that it is better to depend on yourself, if possible, rather than to depend on others since many of them are not empathy on others challenges.