A “strong tower,” a “fortified city” and an “unscalable wall” sound like safe and secure places – and they would be, at least for a while. But eventually they can all be defeated and destroyed.
Yet there are other things which we believe can also provide safety and security for us. “The rich” see their “wealth” as their safe place, while “the righteous” look to “the name of the LORD.” These two are exact opposites and only one really works.
Unfortunately, wealth is not eternal or secure and cannot be counted on for the future. The name of the LORD has been faithful and unchangeable for generations. When the righteous hang out there, they really are safe.