  Guided by the observed properties of hadrons I formulate a perturbative bound
state method for QED and QCD. The expansion starts with valence Fock states
($e^+e^-,\ q\bar q,\ qqq,\ gg$) bound by the instantaneous interaction of
temporal gauge ($A^0=0$). The method is tested on Positronium atoms at rest and
in motion, including hyperfine splitting at \order{\alpha^4}, electromagnetic
form factors and deep inelastic scattering. Relativistic binding is studied for
QED in $D=1+1$ dimensions, demonstrating the frame independence of the DIS
electron distribution and its sea for $x_{bj} \to 0$. In QCD a homogeneous
solution of Gauss' constraint in $D=3+1$ implies O$(\alpha_s^0)$ confining
potentials for $q\bar q,\ q\bar qg,\ qqq$ and $gg$ states, whereas $q\bar
q\,q\bar q$ is unconfined. Meson states lie on linear Regge trajectories and
have the required frame dependence. A scalar bound state with vanishing
four-momentum causes spontaneous chiral symmetry breaking when mixed with the
vacuum.
  These lecture notes assume knowledge of field theory methods, but not of
bound states. Brief reviews of existing bound state methods and Dirac electron
states are included. Solutions to the exercises are given in the Appendix.
