永远不要回头看，除非你想走回去。
Instead of singing like the birds, I silently smiled at my incessant good fortune.
The intelligence of that creature known as a crowd is the square root of the number of people in it.
True leaders are not those who give orders, but those who can inspire others to follow voluntarily.
现代物理学的挑战不仅在于理解宇宙，还在于理解我们在其中的位置。
儿童有着他自己的人格，他自身具有创造精神的美和尊严。这种美和尊严是永远不能磨灭的，所以他的纯洁而非常敏感的心灵需要我们最审慎的爱护。
The future of democracy depends on its ability to deliver economic growth and social justice.