a dusty screen

I am working on my laptop. The sun is blazing in the window. The sun shining on my laptop screen shows how dusty it is! So I wipe it off and I see more clearly. But in the other room with just artificial light, I don't see the dust. We should seek the Son who shines the real Light on our hearts so that can see the dust and ask Him to wipe our soul clean through confession and His forgiveness.