"In every generation, one Slayer is born, because a bunch of men who died thousands of years ago made up that rule. They were powerful men. This woman is more powerful than all of them combined. So I say we change the rule. I say my power, should be our power. Tomorrow, Willow will use the essence of this scythe to change our destiny. From now on, every girl in the world who might be a Slayer, will be a Slayer. Every girl who could have the power, will have the power. Can stand up, will stand up. Slayers, every one of us. Make your choice. Are you ready to be strong?"

Buffy Summers in "Chosen"/"Buffy The Vampire Slayer"