YiPhaseYin & yang
Light and shade, activity and rest: qualities make sense in relation to one another. Their balance changes with the situation. Yin does not mean bad, and yang does not mean good; neither is a permanent label for a person.
I CHING ESSENTIALS · NOTICE, UNDERSTAND, CHOOSE
Read the change.
Choose your next step.
The I Ching offers a language for thinking about changing situations: what is working together, what conditions surround you, and what response fits this moment?
中文导读：看见变化，选择下一步
《易经》不仅提供问卦的方法，也提供观察变化的语言：两种力量如何相互作用？自己处在怎样的环境中？眼前适合进、退、等，还是换一种做法？本课以阴阳、天地人三才与日常选择为入口，把经典观念和现代生活练习分开说明。这是一个入门框架，不是对整部《易经》的唯一概括。
1. Three ways to look at change
Heaven, earth & human
The traditional Three Powers connect natural patterns, the world we inhabit and human responsibility. A modern exercise is to distinguish conditions you cannot control, resources you can work with, and choices you can make.
A fitting response
The same action can fit one stage and fail in another. Preparing, advancing, holding back and withdrawing each have a place. Ask what supports the next step, instead of treating “more” as automatically better.
The commentaries discuss yin and yang in the Xici and the Three Powers in the Shuogua. The latter includes human benevolence and right conduct: this is also about responsibility toward others, not only adapting to circumstances.
中文解说：阴阳、三才与合时的行动
阴阳是在关系中理解事物的两面，如动与静、明与暗，不能直接等同好坏，也不是把人固定分成两类。天地人三才见于《说卦传》：天道阴阳、地道柔刚、人道仁义。把天理解为规律与条件、地理解为资源和环境、人理解为选择和责任，是本课便于初学者运用的现代练习，并非逐字翻译。顺应规律不等于听天由命，更不等于牺牲原则；仍须看见自己的行动空间，以及对他人的责任。
2. Four everyday practices
Work with the conditions
List what is happening, rather than what you wish were happening. A good attitude can help you notice possibilities; it cannot erase a deadline, an exhausted team or an unmet need.
Recognise the timing
Look for readiness and warning signs. Qian’s hidden dragon suggests preparation at the beginning; its overreaching dragon warns against excess. Neither means “always wait” or “always stop while ahead.”
Trace consequences
Ask what an action is likely to cost and what it might change. Losing one opportunity may free time for another, but recovery is not guaranteed. Learning requires attention, adjustment and sometimes accepting a real loss.
Act, and leave room to adjust
Choose a manageable next step, a limit and a review date. When conditions support action, indecision also has a cost. When evidence changes, revising the plan can be wiser than defending it.
中文解说：四个功夫
顺应规律：把事实与期待分开，乐观不代替现实条件。认清时机：观察准备是否充分、过度的信号是否出现，乾卦初九与上九提供不同阶段的提醒。看懂因果：说清行动的代价与可能后果，不能承诺一切损失都会换来补偿。把握机会：条件具备时执行一个具体步骤，同时留下资源、边界和复盘时间；调整计划不必等同失败。
3. A growing project: enthusiasm needs boundaries
中文案例：项目变热闹了，先看基础
你与两位朋友做一个小项目，初期有人关注，于是想加大投入。先看两面：热情推动行动，停下来则能检验需求；再看条件：客户真正需要什么，资金时间还有多少，谁有能力负责？然后明确决策与分工，做一个小测试，设置投入上限并复盘。证据支持才扩大，基础受威胁就减量或停止。问题并非“三个人一定不行”，而在职责不清、目标不一致与互相猜疑。
4. Useful insights, without turning them into fixed rules
“Know when to stop” is about timing, not abandoning every success.
Qian’s Wenyan discusses knowing how to advance and withdraw while keeping to right conduct. A timely boundary may preserve resources; another situation may call for continued work. Consider the stage and consequences.
“见好就收”可作现代提醒。《乾·文言》强调知进退而不失其正，不是只要成功就必须退出。
A change of perspective helps; a positive mood does not decide the outcome.
Notice the facts, your interpretation and the alternative explanation. Hope may help you act; fear may alert you to risk. Examine what each feeling points to rather than forcing optimism.
心态影响观察角度，但不会单独决定结果。把事实、解释与感受分开，既看机会，也看真实的阻力。
Loss and gain change with time; there is no promise of equal repayment.
Sun’s Tuan relates decrease, increase, fullness and emptiness to changing times. This is not a conservation law for money, relationships or luck. A setback can lead to learning when you reflect and adjust; it does not have to be called a hidden blessing.
损卦《彖传》说损益盈虚与时偕行，不能据此推出“失去总会以另一种形式回来”的守恒承诺。损失可能是真实的；复盘与调整才可能带来新的能力和机会。
Sun’s “three travellers” is a particular line, not a rule against three-person teams.
Sun, line three, describes three travelling together and one being reduced, then one travelling and finding a companion. Read it within the hexagram’s relations and theme of reduction. Our teamwork example draws a modern lesson about alignment and divided commitments; it does not set a universal headcount.
“三人行，则损一人；一人行，则得其友”是损卦六三的爻辞，应结合卦爻关系与减损主题理解。本课借它提醒协作须专一、关系须清楚，而不是“事不过三”或所有合作只能两人。
5. Try it with one real concern
- Name the matter. What decision do you actually face?
- Separate the layers. What conditions, resources and responsibilities are involved?
- Notice the stage. Are you preparing, acting, overreaching or ready to change direction? What evidence supports that view?
- Choose a response. What is one useful step, what is its limit, and when will you review it?
Write this privately if you wish. This exercise does not collect or submit your notes.
中文练习：把一件事看清楚
写清现在要决定什么；区分外部条件、可用资源与自己的责任；凭具体证据判断所处阶段；选择一个能执行的步骤，设边界和复盘日期。可以在自己的纸上记录，本练习没有收集或提交输入的表单。
Classical basis & editorial approach
This beginner framework and the project example are original YiPhase explanations, not a transcript of the supplied videos. The practical checklist is a modern application; it is not claimed as a verbatim ancient four-part formula.