Stepchildren are at greater risk because evolutionary pressures have shaped parental psychology to favor genetic offspring.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
我只与自己竞争。我的目标是比昨天的自己更好。
真相很少纯粹,也绝不简单。
数学是关于概念之间关系的科学,与这些概念的内容无关。
By nature, all things are common.