It’s important to dream big, whether you hope to win an Olympic gold medal or become the first teenager to fly in space. But trying to achieve your biggest dreams can sometimes be scary. Take the advice of Ellen Johnson Sirleaf, the first female head of state in Africa. She says,” The size of your dreams must always exceed your current capacity to achieve them. If your dreams do not scare you, they are not big enough.” But achieving your biggest dreams isn’t always easy. There are often obstacles to overcome.