The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.
最有效的调试工具仍然是仔细的思考，再加上明智放置的打印语句。
I'm a failed poet. Maybe every novelist wants to write poetry first, finds he can't and then tries the short story which is the most demanding form after poetry. And failing at that, only then does he turn to the novel.
The mystery of creativity is like the mystery of freedom.
The purpose of art is to make the invisible visible.
Happiness depends upon ourselves.
The key to managing complexity is to focus on the interfaces between components, not their internal details.