Once a year, every Jew would give half a shekel for the Temple. It was such a central event, there’s an entire tractate of the Talmud discussing its laws. It’s called “Shekalim.” But nobody gave a whole shekel. You weren’t allowed. Everyone had to give the same one half. So why is the tractate called “Shekalim?” Because the point was not that you should come and give a half shekel. Rather, it was that you should feel you are incomplete until another Jew gives another half shekel. And every Jew should feel incomplete until everyone has given their small and equal contribution of half a shekel. Because none of us are complete without the other, and each of us fills in that which the other is missing. Pekudei 5741, Sichot Kodesh 61-62.