Never give up: when does the advice fit?

You are learning a short tune. Yesterday you played two bars cleanly; today you keep missing the third. There is a concrete skill to practise and a small sign of progress. Another focused attempt can teach you something. Change one condition: Your wrist now hurts each time you repeat the movement. Repeating through pain changes the decision. Stop the practice and decide what needs attention before continuing.

You keep organising a weekly club after all members say the time no longer works. The room fee continues. More effort at the same time does not address the reason people stopped coming. Change one condition: Three members commit to a new time, and one will help organise. There is a changed plan and a real commitment to test. A short trial now has a different basis.

One part is missing from a repair. A supplier may have it, but the price and delivery date are unknown. Continuing makes sense only if the part, cost and remaining use justify it. The work already spent cannot answer that. Change one condition: The quote arrives: the part costs more than a working replacement. The new quote changes the remaining choice. Finishing just to protect past effort does not recover it.