This quote, like so many from Rose Kennedy, came from experiences she suffered. She appreciated that money can buy happiness for the less fortunate, but not for one's self, so she encouraged philanthropy but turned to her faith for sustaining power.
"Be Strong and of good courage. You are truly royal spirit daughters of almighty God. You are Princesses destined to become queens. Your own wondrous story has already begun. Your once upon a time is now." - President Dieter F. Uchtdorf