我们对宇宙了解得越多,就越意识到我们不知道的还有很多。
互联网可能是迈向教育、组织和参与一个有意义的社会的非常积极的一步。
The greatest teacher is called “doing”.
"When I approach a child, he inspires in me two sentiments: tenderness for what he is, and respect for what he may become."