Although nothing will explain everything, still it's fine with the first point: increasing the rotation vector of momentum in spacetime increases mass. The rest follows, since you know that the more mass, the more energy required to accelerate still more.
But if you are interested, a significant amount of the basics of quantum mechanics follow directly from Fourier transforms -- which unfortunately are harder to self-study than spacetime rotations.
But if you are interested, a significant amount of the basics of quantum mechanics follow directly from Fourier transforms -- which unfortunately are harder to self-study than spacetime rotations.