心理学唯一有效的数据是可观察的行为。

Character is doing the right thing when nobody's looking. There are too many people who think that the only thing that's right is to get by, and the only thing that's wrong is to get caught.

Integrity in business is non-negotiable—it’s the foundation of lasting success.

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

Sustainability isn't just a buzzword; it's the foundation of responsible mining.