自信不是"他们会喜欢我"，而是"如果他们不喜欢我，我也没关系"。
Confidence is not 'they will like me'. Confidence is 'I'll be fine if they don't'.
任何农场最好的肥料是其主人的脚步。
文学是未言之物的艺术。
解释：处在有利的地位上想到道义，处在困难之中想到保持纯正。
The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.