现在是过去卷起来准备行动，过去是现在展开来准备理解。
The present is the past rolled up for action, and the past is the present unrolled for understanding.
In mining, the real competition is often against the market's short-term mindset.
The goal of mathematics is not to solve problems, but to understand them.
Writing is the only thing that, when I do it, I don't feel I should be doing something else.