Blasphemy, what is it?

From today's reading: "Therefore I tell you, people will be forgiven for every sin and blasphemy, but blasphemy against the Spirit will not be forgiven." Matthew 12:31 This goes on to say that even speaking against Jesus will be forgiven. So what is blasphemy? Is it just cursing or being irreverent? Actually neither of those were part of the original meaning. More than anything, it meant making statements about God which were blatantly untrue. Jesus was accused over and over of being a blasphemer and now we take what he said as truth - truth that the establishment (the religious leaders of the day) didn't want to hear. Over the ensuing years there have been many people who have been accused of blasphemy for expounding one belief or another to the exclusion of the whole. It's real easy to claim "blasphemy" if you don't agree with what a person saying. But when we do that, are we (like the Pharisees) refusing to believe and acknowledge that God might be doing a new thing in our midst once again? As we grow and mature as human beings (and as Christians), both individually and as a race, God continues to reveal himself in new ways and to bring new understanding into our lives. Are we open to hearing what the Spirit has to say to us today?