The greatest thing in the world is to know how to belong to oneself.
If you don't like something, change it. If you can't change it, change your attitude.
To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.
In the darkness, two things are common to all men: fear and the desire for light.
The future of coal lies not in its quantity but in how cleanly and efficiently we can use it.