The only limit is the one you set for yourself.

I'm not trying to be cool. I'm just being myself.

The great challenge of our time is to build institutions that can manage the complexity of modern societies.

"Education is the most powerful weapon which you can use to change the world."

有了实际工作的经验，幼儿的自我就会逐渐发展强化。

你为某事付出的努力越多，当你实现它时感觉就越好。

The future of liberal democracy depends on its ability to adapt to new challenges and to maintain the support of its citizens.