It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.

What we know is not much. What we do not know is immense.

"文学的价值不在于它的流行程度，而在于它能否触动读者的内心。"

科学不仅仅是发现新事物，还包括提高世界各地人们的生活质量。