The Power is what sorcerers call the energy that makes magic happen. Every sorcerer can call on Power and shape it using their knowledge.
Unfortunately, you're inept. You might be a barely adequate apprentice struggling to win your master's respect. You might be a senile old coot who's forgotten most of his spells. You could even be an ordinary high school student, balancing your homework, your home life, and the study of an old grimoire you found with your friends. You're not exactly a master of magic.