Sand. It comes from years and years of waves pounding on the rocks. Currents, tides, and other rocks crash, pummel, and smooth rocks into small smooth stones. The process continues, and the rocks soon become tiny little rock fragments. Eventually, just a speck of rock is left. And that's the sand. And, when the process is completed hundreds of thousands of time, we get a long stretch of sandy beach. Which is soft and pleasant.
Sometimes life is hard. Sometimes pain is necessary. Sometimes we want to give up, because everything is crashing in on us, and making things all together too hard. But giving up isn't worth it. Because, in the end, something good will come of it. If we keep pushing on. And pushing on. And pushing on.
Sorta like sand.