数学的本质在于它的自由。
People who learn to control inner experience will be able to determine the quality of their lives, which is as close as any of us can come to being happy.
Leadership in the coal industry today means navigating the delicate balance between economic necessity and environmental responsibility.
没有人写作、绘画、雕塑、建模、建造或发明，除非是为了真正地逃离地狱。
Every scientific discovery is a new dialogue with nature, bringing us closer to the mysteries of the universe.