Are there unforgivable sins?

Jesus came and died for our sins so that we may be forgiven and have salvation. But Matthew 12:32 (NIV) says there is at least one thing to prevent being forgiven. > **32** Anyone who speaks a word against the Son of Man will be forgiven, but anyone who speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come. Are there unforgivable actions that would clash with Jesus' sacrifice (eg: an unbeliever 'speaks against the Holy Spirit', then later in life repents and turns to Christ.) Will that person be granted eternal life?