Every discovery in physics opens a door to a new mystery, and that is the beauty of science.

The greatest inventions are those which most directly meet the wants of mankind.

图画书就像一个小剧场。

做好事如同背负重物而登山，志向虽已确立，但总是担心力不从心；干坏事如同骑马下山，虽然未加鞭，但却欲驻足而难以自禁。

"The greatest enemy of love is not hate, but indifference."

优秀的领导者需要一个积极的议程，而不仅仅是处理危机的议程。