We must mine coal responsibly today so that our children inherit both energy security and a healthy environment.

The strength of a building is not just in its materials, but in the spirit of the people who use it.

The difference between a good business and a bad business is that good businesses throw up one easy decision after another. The bad businesses throw up painful decisions time after time.

"In the realm of algorithms, elegance is not just aesthetic—it often leads to efficiency."

"Reading is the gateway to imagination."