文化进化的研究必须考虑社会的内部动态和外部环境约束。
The only sensible ends of literature are, first, the pleasurable toil of writing; second, the gratification of one's family and friends; and lastly, the solid cash.
我因展望未来而感受到的喜悦——成为注定从世界上消除最大灾难之一的工具,与享受独立、家庭和平与幸福的殷切希望交织在一起,常常占据了我的整个心灵。
现在的你,已经足够好了。
"Success is not given, it is earned."