我已将这一原则——每一微小变异若有益便被保存——称为自然选择。
I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  
Every story is a journey, and every journey changes the traveler.
家庭和睦是人生最快乐的事。
The decline of violence may be the most significant and least-appreciated development in the history of our species.
Love is the most powerful force in the world.
No testimony is sufficient to establish a miracle unless the testimony be of such a kind that its falsehood would be more miraculous than the fact which it endeavors to establish.
There is no such thing as being “on time.” You are either late or you are early. Your choice.