Mark 3:29
"But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation"
If you're never forgiven, how can you not be eternally damned? If you're only "in danger of eternal damnation", then what can you do to get to heaven without being forgiven?
Matthew 12:32
"And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come."
Luke 12:10
"And whosoever shall speak a word against the Son of man, it shall be forgiven him: but unto him that blasphemeth against the Holy Ghost it shall not be forgiven."
I still don't follow you can never be forgiven but at the same time only possibly be eternally damned? Being in danger of being hit by a bus is not the same as being hit by a bus.
http://dictionary.reference.com/browse/danger
"Danger is the general word for liability to all kinds of injury or evil consequences, either near at hand and certain, or remote and doubtful"