见者易，学者难。莫将容易得，便作等闲看。
看着容易，要学会就很难；千万不要把容易得到的东西看得普通，就不知道珍惜。
A woman's guess is much more accurate than a man's certainty.
晏子春秋
"Parental investment is the key to understanding the origins of sex differences."
世界并不是简单地分为好人和食死徒。