When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.

The only constant is change, continuing change, inevitable change, that is the dominant factor in society today.

我不是悲观主义者。我是一个受过现实主义训练的乐观主义者。

发现的喜悦无疑是人类心灵所能感受到的最活跃的。

All money is a matter of belief.

The ethical questions raised by CRISPR are not obstacles—they are essential conversations.

可持续性不仅仅是一个流行词，而是我们对后代的责任。