It’s an old Aerosmith song – I’m pretty sure Steven Tyler is referring to wearing down a woman’s rebuttals, but I am using the phrase to refer to creativity and making something good.
There is no such thing as a fully formed masterpiece. It has to be worked on day in and day out over time. Some examples:
You can’t reap the true benefits from a healthy diet by merely throwing up after eating a Macdonalds. Or even by cutting down on the bad stuff for a week. It needs to be a sustained, long term effort to have any impact.
The Beatles honed their craft in Berlin for years before releasing a hit record.
Apple iterates on its software more times than I care to imagine.