"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." Bertrand Russell
Great image i like im actually gonna keep it as my desktop background for a long time. i like the grey white and black. The only thing i dont like is the ball in the middle.
If you could, perhaps, blur the edges of the ball and wording over the ball so that it looks inscribed. Stylized Kanji or perhaps Hebrew or some nice Arabic calligraphy.
I think you should leave the ball in the middle, maybe you should just sharpen it, with my contrast, so that it looks as clear as the rest of the image.