另一个人的心是一片黑暗的森林，无论它曾经多么接近自己的心。
The heart of another is a dark forest, always, no matter how close it has been to one's own.
Worth repeating: measure twice， cut once.
When something is important enough, you do it even if the odds are not in your favor.
资本资产定价模型（CAPM）是理解风险-回报权衡的有用工具，但它并非对现实的完美描述。