You know something. You have worked it out, lived through it, built it from scratch or inherited it well and tested it. And there is a friend in your life who does not know it yet. They are earlier on this particular road. They ask you questions that you stopped asking years ago, not because the questions are simple but because you now carry the answers in your body.
This is the friend who is also a student. Not a formal student — they have not enrolled. The relationship didn't begin as instruction. It began as friendship, and at some point the asymmetry in a particular domain became visible and both of you oriented to it. Now, sometimes, you teach.
Law 5 — Revise — is the law of evolution and transparent archive. It is about what accumulates and what changes. The friend-student invokes it in both directions: they are revising themselves through what you offer, and you — if you are paying attention — are revising yourself through the act of teaching them.
Teaching clarifies. When you try to explain something you know to someone who doesn't know it, you discover the shape of your own understanding. The gaps become visible. The assumptions you were carrying without inspecting get surfaced because the student, who is not yet habituated to the assumption, asks about it. Their beginner's mind is not a deficit; it is a tool that cuts through your expertise's accumulated crust.
The risk in this friendship is the same as in the inverse: calcification. If you are always the teacher and they are always the student, the friendship has become a hierarchy. You are the authority. They are the dependent. That is a comfortable arrangement for people who find being needed reassuring, and a comfortable arrangement for people who find deferring easier than developing their own views. Both forms of comfort are, in the long run, corrupting.
Law 5 requires that you notice when the student is ready to stop being primarily a student in this relationship. Growth is the point. If your friend has grown — if the asymmetry that organized the dynamic has narrowed or reversed or shifted — and you have not adjusted, you are now preventing the revision you were supposed to be catalyzing. You have made yourself a ceiling.
The best version of this friendship is one where your student-friend eventually has nothing to learn from you on the terrain you once led — and you consider this a success. Not a loss. Not a threat. The success condition of teaching is that it makes itself unnecessary. If you cannot reach that posture, you were not really a teacher. You were a gatekeeper who charged admission in deference.
What the friend-student offers you, aside from the clarifying function of teaching, is a particular kind of stake in someone's development. Their growth is partly attributable to what happened between you. That is not a possession — their growth belongs to them — but it is a connection that has a specific texture. You have invested in someone's becoming. That investment creates a bond that is not easily replicated. It is one of the reasons that students and teachers, formal or informal, often maintain affective ties long after the teaching relationship's functional purpose has passed.