我不是因为快乐而歌唱，而是因为歌唱而快乐。
The circular economy isn't coming - it's already here. The question is whether your business is ready.
我对自己的工作如此着迷，以至于几乎等不及早上起床就开始工作。
宇宙学家经常犯错，但从不怀疑。
一个有趣的悖论是：当我接受自己的本来面目时，我就能改变。
The man who does not read has no advantage over the man who cannot read.
