做东西的时候，总要多备上一些——额外的材料、额外的部件、额外的空间、额外的饰面。这些额外的东西可以为错误提供备份、减轻压力，还可以为未来储备资源。它们是最便宜的保险。
When making something， always get a few extras — extra material， extra parts， extra space， extra finishes. The extras serve as backups for mistakes， reduce stress， and fill your inventory for the future. They are the cheapest insurance.
The magic number 150 suggests that the size of our social networks is limited by the size of our brains.
The past whispers to us through our genes.
程序员最重要的技能是清晰和逻辑地思考的能力。
To create is to resist—to resist silence, to resist forgetting.
Sometimes the most ordinary things can be made extraordinary.