What the valley actually does
At dawn, after a cold night, mist lies in the valleys like a still lake while the ridges above stand clear and bare. Nothing chased it there. Cold air sinks, and the mist gathers in the lowest ground. The valley is visibly holding something the heights are not, and it did nothing to get it except be low.
That is 谷 (Gǔ). Look at the character: the bottom is 口, an opening, with strokes spreading above it like slopes coming down to meet it. High sides, and an open place at the bottom where things arrive. The valley does not perform receiving. It is the shape that receives.
Lao Tzu reaches for this image again and again, and his claim is precise. The valley does not receive in spite of being low, as a consolation for having no height. It receives because it is low. Chapter 66 says it about water: the rivers and seas rule the hundred valleys because they are good at staying below them. Lowness is not the cost of receiving. It is the mechanism.
It sits in a crowded neighborhood, so the line is worth drawing. 謙 is about going last, precedence rather than elevation. 虛 is the empty interior of a vessel, useful because it is empty. 水 is the current moving toward the low place. 谷 is only ever this: being low enough that what flows will reach you, and letting it stay when it does.
Where Lao Tzu speaks of it
The cost of needing no one
Many of us learned early that the safest thing was to need nothing. Handle it yourself. Deflect the offer, wave off the compliment, insist you are fine. It gets called independence, and often it began as a sensible way to survive something. But it has a shape, and the shape is high ground.
A high stone in the rain gets just as wet as the valley below it. None of it stays. Help is offered and slides past. Care arrives and runs off. Nobody is withholding anything from the person who can never receive. They are simply standing where nothing can settle, and carrying everything alone because nothing else can reach them.
谷 does not argue with that. It only notices that a summit is very impressive and very dry. Being low enough to receive is not collapse or helplessness. It is letting what is genuinely offered, help, rest, someone carrying part of the load, actually land, and staying long enough to let it.
The next time someone offers help, a compliment, or to take something off your hands, do not deflect it. Say yes, or thank you, and stop there. No explaining why you did not need it, no instant repayment. Let it settle the way mist settles in low ground.