The only thing that is truly yours is your dreams.

The nose of a mob is its imagination. By this, at any time, it can be quietly led.

Coal keeps America competitive in the world.

The power of positive thinking is the ability to generate a feeling of certainty in yourself when nothing in the environment supports you.

释义：他强调空气密度对于物质形态的决定性作用，认为物质的形态和性质都受到空气密度的影响。