Thanks, @sukhasanasister, nice to meet you.

Yes, it is a metaphor, one is loading the gun in the background and the other is shooting it at the front. In this case, an old couple was meant (which I know quite well). But it fits the picture of many people, I guess.
Another picture could be from a similar art "Gríma Wormtongue" from Lord of the Rings who whispered the King his poison and the King his commands to his underlings.

LOL! What you say about the viewer I heard before. People told me: Oh, what? Is it not finished? To me, it looks finished. To create a mandala and destroy it afterward must be a strong experience.
I often thought that little children are monks. They build huge sandcastles at the beach, tongue hangs outside the mouth on one side for quite some time. And then, when they are finished, they happily destroy their creation.

What kind of unfinished work do you sit on? Will you tell?