Rome wasn't built in a day.
Everyone knows that.
It took hundreds of years for Rome to reach its peak.
But Rome also didn't fall in a day.
It also took time, hundreds of years, for Rome to decay and fall apart.
He goes on to say that each day we're either improving or decaying, either getting a little better or getting a little worse. Those little things add up over time to make a big difference in our lives.