  We revisit the classical relation between the strangeness content of the
nucleon, the pion-nucleon sigma term and the $SU(3)_F$ breaking of the baryon
masses in the context of Lorentz covariant chiral perturbation theory with
explicit decuplet-baryon resonance fields. We find that a value of the
pion-nucleon sigma term of $\sim$60 MeV is not necessarily at odds with a small
strangeness content of the nucleon, in line with the fulfillment of the OZI
rule. Moreover, this value is indeed favored by our next-to-leading order
calculation. We compare our results with earlier ones and discuss the
convergence of the chiral series as well as the uncertainties of chiral
approaches to the determination of the sigma terms.
