As my parents always say to me "Education is the most powerful weapon which you can use to change the world- Nelson Mandela"
If your parents are the ones saying this, then there should not be a reference to Nelson Mandela. This makes your statement appear to be a lie. Why? Your parents did not say it, Nelson Mandela did. One point against you for not being honest in your declarations at the very start of your essay. Remember that you are signing an oath with this application attesting to the truthful information within your essays that you will be submitting throughout the application process.
Your family cannot be your biggest motivation for applying to the course and scholarship. You get nothing by being motivated by them. They can be an inspiration, but definitely not a motivation. The motivation needs to be related to a personal career decision and its relevant background. Wishing to study abroad on funding cheapens your motivation to apply for the GKS-U scholarship. That means you are applying for multiple scholarships and will accept the first offer you get. You are really off to a disqualifying start with this presentation. From the first to second paragraph, you have successfully disqualified yourself from the competition already.
Here is my advice, review the prompt requirements again. Pay specific attention to the Korean relationship, the motivation to study in Korea, and other Korea specific requirements. You do not have an effective essay at this point. I cannot even continue to read it because of the inappropriateness of your statement. If I cannot continue reading it, the actual reviewer most certainly won't finish reading it either.