Well, if we take the Bible as true, blasphemy and suicide are two things you can't repent from.
Also - when do we repent? Do we get the chance to repent once we're dead, or do we have to do it before we die?
Every scholar will tell you that the Bible is not a literal truth, even the New Testament. It's filled with metaphor and symbolism. Also, we have to remember that the Bible was written for a purpose--didactically--and the author of passages within it that claim what you said may have been writing for a different type of culture or community. Remember, the Bible was collated over numerous years, by many, many authors, schools of thought and etc. As you see with political parties, there are various ideological differences or factions, however, they are united under the one cause. I believe that the Bible acts as a model (which is different for other people or cultures) for us to follow how to live our lives. Moreover, I don't know of any passages in the New Testament which speak of blasphemy and suicide as unrepentable. Jesus says that he is the 'replacement of the Old Law, the replacement of the Feasts' (John 7:28)....He says is the 'new commandment and covenant' (john 15 or 13)... Therefore, the New Testament is the new order and new model for the Christian community.
I think that God wants us to live a good life, for others, however, I think we are truly judged when we die. Although, you know what, I have no idea what happens when we die, so I just try to do my best and try to impact society in a positive way.