  Light-Front quantization is one of the most promising and physical tools
towards studying deep inelastic scattering on the basis of quark gluon degrees
of freedom. The simplified vacuum structure (nontrivial vacuum effects can only
appear in zero-mode degrees of freedom) and the physical basis allows for a
description of hadrons that stays close to intuition. I am reviewing recent
progress in understanding the deep connection between renormalization of
light-front Hamiltonians, effective light-front Hamiltonians and nontrivial
vacuum condensates.
