Roald Dahl:“Having power is not nearly as important as what you choose to do with it.” – Matilda. what does this quote mean?

You could be King of the World, but achieve nothing important, or you could be a humble worker who changes the world around them. So it's not power that allows us to do great things, but caring, motivation and persistence,

I highly recommend you watching the award winning movie "The Boy Who Captured the Wind" the true story about a young boy in a poor country who managed to do what others could not.