  An often used mass formula for Nambu-Goldstone (NG) bosons in QCD, such as
the pions, involves the condensate $<\overline{q}q>$, $f_{\pi}$ and the quark
current masses. We argue, within the context of the Global Colour Model to QCD,
that this expression is wrong. Analysis of the interplay between the
Dyson-Schwinger equation for the constituent quark effect and the
Bethe-Salpeter equation for the NG boson results in a new mass formula.
