如果你还在想着昨天，你就不会有更好的明天。

The Celts have a close affinity with nature.

——〈在广州农民运动讲习所第一届毕业礼演说〉，对讲习所学员发出警告，无法在中国发动阶级斗争，反之应该要用平和方法，以合作为诉求，1924年8月21日

The most sustainable resource is human ingenuity.

The universe is full of mysteries, and that’s what keeps scientists motivated.

"The more that you read, the more things you will know. The more that you learn, the more places you'll go."