There is as much greatness of mind in acknowledging a good turn, as in doing it.

Receiving well is a skill, and it is scarcer than generosity. Acknowledging help means admitting you needed it, which is the part people dodge with a joke or a quick offer to repay, and the dodge quietly cheapens what was given. Taking it plainly, and saying so, costs pride and returns something to the person who helped.

Think of a favour you have never properly named. Go back and name it specifically: what they did, what it made possible, that you have not forgotten. Do it without immediately balancing the ledger, because the rush to repay is often another way of refusing.