  We analyze the equal-time Bethe-Salpeter quark wave function of the pion
obtained from a quenched lattice QCD calculation with delocalized quark
interpolators. We find that the result agrees remarkably well with the
predictions of the Nambu--Jona-Lasinio model in all channels. We choose the
quenched lattice QCD, since it is closer to the large-Nc limit of the
Nambu--Jona-Lasinio model. We also show how transversity information, relevant
for the light-cone physics, can be obtained from our equal-time rest-frame
lattice calculations.
