It is on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.
Sustainability and efficiency must go hand in hand in modern energy production.
经济发展中最重要的事情不是正确地做事，而是做正确的事。
Your time is limited, so don't waste it living someone else's life.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.