  We investigate light meson bound state contributions to six quark Green's
functions and establish that the latter has poles corresponding to baryon bound
states. We estimate light baryon masses including the Roper resonance.
Constituent quark model and the Parton model are natural consequences of this
quantum field theoretic picture. We elaborate this analysis to pentaquarks and
heptaquarks. An almost model independent prediction for the mass of $\theta$
pentaquark is $1.57Gev$.
