Actually, you could perceive perfection by looking into a diamond and seeing no impurities... Thus, you have a flawless diamond.

I'm going out on a limb here, but I think dark matter exists because the universe constantly expands, and since matter cannot be changed or created, and you'd find the density of the universe by dividing the mass by the volume, but either --- I can't remember --- one of them is finite and another is infinite. According to calculus, a finite number divided by an infinite number equals zero so it doesn't make sense the universe could be here if it's matter...or am I wrong here? That's just a little guess.