"Big Sister is dead. She's no longer here. However, on my back, and within my heart, she lives on in me! If you're gonna dig, dig to pierce the heavens! Even if it's my own grave I'm digging, I'll keep going. Because once I've dug my way through, that means I've won! Who do you think I am? I'm Fluttershy. I'm not my sister, Rainbow Dash. I AM MYSELF! Fluttershy The Digger!"
With all the talk of believing in yourself, this is the first thing I thought of. If you haven't seen Gurren Lagann what is wrong with you?