Even you wanted be Lion, you were born as a human by your destiny. You can't change your destiny by your will. You have to accept your destiny. Otherwise you will lose your mind.
You can realize your dream that makes you spend happy life by your will. If you can't realize your dream, the reason might be lack of your effort. If you can't realize your dream even by your maximum efforts, you would better to give up your dream as your destiny.
By believing that “You can’t change your destiny, but you can change your life”, let’s enjoy our life.