Math is Beautiful, math is the absolute truth and that makes it beautiful. Mathematicians even go so far as calling it an art form.
mathematics, rightly viewed, possesses not only truth, but supreme beauty — a beauty cold and austere, like that of sculpture, without appeal to any part of our weaker nature, without the gorgeous trappings of painting or music, yet sublimely pure, and capable of a stern perfection such as only the greatest art can show - Bertrand Russel
The beauty in math cannot be found, you cannot discover the beauty of a symphony - you either see it or you do not, in the same way you either see the beauty of math or you do not.
One of the most amazing equations, in my opinion, is the Lorentz factor,
γ = (1 - V^2/C^2)^(-1/2)
Virtually all of the mathematics behind Einsteins theory or special relativity relates back to this one tiny, simple equation. And that is Beautiful.