There is no power on earth that can neutralize the influence of a high, simple and useful life. 

Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts.

The most powerful force in the universe is compound interest.

Nobody is as powerful as we make them out to be.

Harnessing steam power required many innovations, as William Rosen chronicles in the book 'The Most Powerful Idea in the World.'