for general relativity, all i see on the internet is a bunch of statements clustered together: "oh yeah, general relativity is pretty important and explains black holes, time dilation, and gravitational lensing" but what is it? at a point that has more energy, time goes faster? in other words im looking for an intepretation of the einstein field equation without knowing diff eq's i think ive read a simple statement about special rel: speed of light is c in a vacuum and physical laws are the same in every inertial ref. frame. and a third question im wondering about: why does your mass increase exponentially when you get linearly closer to the speed of light? im looking for an intuitive explanation rather than just something like "well in this equation the dependent variable has a power attached to it"