I see kids skating on a pond. Some are lacking up their skates. Some are twirling around. It is a lovely scene.
And, I see a massive brick wall rise up in the middle of the pond. It creates a barrier of safety. The waterfall on the other side of the wall is unreachable.
The kids go on playing unaware of how close they are to the edge, but it matters not.
His walls are salvation. He is the strong fortress that protects His children. We just go on playing. He watches over us.