Never doubt that you can change history. You already have.

marge piercyneverdoubtthatyoucanchangehistoryyoualreadyhavenever doubtdoubt thatthat youyou cancan changechange historyyou alreadyalready havenever doubt thatdoubt that youthat you canyou can changecan change historyyou already havenever doubt that youdoubt that you canthat you can changeyou can change historynever doubt that you candoubt that you can changethat you can change history

If you don't like something, change it. If you can't change it, change your attitude. -Maya Angelou
If the Sun and Moon should doubt They would immediately Go out. -William Blake
Change your thoughts and you change your world. -Norman Vincent Peale
It's better to close your mouth, and look like a fool; than to open it, and remove all doubt. -Ukendt
Never in history, had so many, so few, to thanks for so much. -Winston Churchill
Live out of your imagination, not your history. -Stephen R. Covey