The "Sign of Jonah"

Jesus was annoyed at the demand for a "sign", especially when he stood before them, taught with authority and worked miracles.  What more would people need?  So he refused, saying that no sign would be given other than the "sign of Jonah". The Ninevites, as badly in need of conversion as they were, saw and accepted the "sign of Jonah" and repented, the sign being Jonah's change of heart after trying to escape from his mission, and turning around to fulfill it.  A clear sign of the power of God working in him and a verification of that power's capacity to work in anyone.  Yet, many of the Jews could not recognize this power standing right before their eyes.
So too with us...The Mass, the Sacrament of Reconciliation, Lenten devotions, the special services offered in our churches during Lent...all stand before us, yet we sometimes ignore them, looking for what?  Something more spectacular?  Do we have to be swallowed up by a large fish to wake up?
What are the signs right before us, within our grasp?  What is blinding us from seeing them or paralyzing us from responding to them?
Bro. Rene