Since Einstein formalized the relationship between mass, energy, and velocity, humanity has understood intellectually that light speed is not a frontier to be crossed but a horizon that recedes infinitely as one approaches it. What physics demonstrates — through elegant mathematics and the daily operations of particle accelerators — is that the barrier is not technological but ontological: massive objects and massless particles are not rivals in a race but inhabitants of fundamentally different categories of existence. The dream of reaching light speed is not a problem awaiting a solution; it