推古验今，所以不惑。先揆后度，所以应卒。
释义：推究古代的事例来验证今天的情况，从而避免困惑；先揣度事情的始末，后仔细考虑，从而应对突发情况。这是对借鉴历史、谨慎行事的智慧的强调。
I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.
No matter how tough you are, golf will always find a way to humble you.