有时我们会为某些事情感到悲伤，而我们不愿意告诉别人我们为此感到悲伤。
Sometimes we get sad about things and we don’t like to tell other people that we are sad about them.
解释：别人爱我，我也一定会爱别人；别人厌恶我，我也一定会讨厌别人。
We need to think creatively about how to solve the world's biggest problems.
The universe is under no obligation to make sense to you.
The most important single aspect of software development is to be clear about what you are trying to build.
