The most valuable resource we extract isn't coal—it's the talent and dedication of our people.
心灵是一个使生活成为可能的系统。
La poesía es la única prueba concreta de la existencia del hombre.
"We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction."