  In this paper, we study the (1+3) dimensional massive Maxwell-Dirac system in
the context of global existence and asymptotic behavior of solutions under the
Lorenz gauge condition, as well as the modified and linear scattering phenomena
for the Dirac spinor and the electromagnetic potential, respectively. We employ
a vector fields energy method combined with a detailed analysis of the
space-time resonance argument. This approach allows us to establish decay
estimates and energy bounds crucial for proving the main theorems. Especially,
we provide the explicit phase correction arising from the strong nonlinear
resonances.
