Smart analysis Veli!

What I see looking at the photo is the distinction between the part you regard as dark and the lighter one:

In the darker part - we can clearly see what's in the bottom of the little hole, while at the lighter part - we might just imagine a mirror at here, making us look at ourselves and miss the chipped pebbles filled hole.

Many times we have two ways of looking at things - when we look at others and their deeds, we see perfectly deep, seeing everything that's wrong with them and criticise them, but when it comes to ourselves - the little chips in our personality and the wrong things we do disappear- we see only the surface of things and refuse to look deep and honestly upon ourselves.

What we should do is to try to be whole - just like we got the visible and the mirrored part together in one hole- we should try to look deep on one hand, on ourselves and on others, and be merciful and try to look favorably upon others also just like we do upon ourselves.