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.
没有承诺，你永远不会开始，但更重要的是，没有坚持，你永远不会完成。
Every mental state is a function of some physical state of the brain.
自守形式的研究是数学思想统一性的反映。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
Sometimes silence speaks louder than words.