This statement is basically saying there is no easy way out of endurance training. There is no shortcut. In order to build endurance you have to take the long hard road up hill to achieve your goals. This means never giving up and believing in yourself.
I think feminism allows young people (not just girls) to aspire to dream big and become whatever you wish. Become President. Become a teacher. Be a mom. Be you not what society dictates you to be. That's what's truly empowering.