We have to work in order to achieve our dreams. Imagine being diving in a deep sea and you have to go up as soon as possible before you run out of oxygen. You can see the sunlight from afar. Yet, you don't have enough time. You should work as hard as you can in order to save your life. This is how you should work in your life.
If you don't work hard in order to achieve your goals, you will die before you can see them in your reality. Therefore, I invite you to work harder and harder to break despair barrier and turn your dreams into reality.
Indeed, you may need to challenge your self since life becomes better with such challenge. Benjamin Franklin says that Many people die at twenty five and aren't buried until they are seventy five.
You should be different from those dead people. Reject despair and start dreaming dreams that you will achieve. You are so special and your vision should make some difference in the world.