It will prove how great you are.
When you follow your dreams and you became successful, you can walk with pride knowing that you are able to succeed despite all discouragements and most of all, you are happy with the path that you chose.
You will know yourself better.
Pursuing your dreams will not be that easy, but since it is really what you want, you can initiate or plan better things for everything to work out. When faced with a great challenge, you may even be surprised to know that you are capable of doing things you never have thought of before