"To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness."

Sustainable development is not an option, but a necessity for the coal sector.

The study of algorithms is not just about solving problems, but about understanding the limits of what is computationally possible.

The investor's chief problem - and even his worst enemy - is likely to be himself.