The definition of Blasphemy is expressing a lack of reverence. It is the showing of disrespect toward something sacred. Blaspheming the Holy Spirit occurs when a person who knows better rejects the Word of God which the Holy Spirit is attempting to bring into the heart of that person. Hence this rejection or this refusal is telling the Holy Spirit that what he is trying to bring into the person's heart is not being believed, that it's not worth the effort or the time to even look into it or study it, that the very Word of God is not important, and that the beliefs and teachings of Jesus Christ are being rejected.
God has given us all free will and whether we accept Jesus Christ is eventually left up to us. But the Holy Spirit spends your entire life trying to bring Jesus Christ into your life, and if you die still rejecting his efforts, then you have committed the unforgivable sin. If you leave this world still having a unrepentant heart, then you have committed the unforgivable sin. And God will not want those in heaven with him who have been so contemptuous and rebellious. Ask yourself this one simple question. Would you want to spend eternity with people who are not sorry, and who don't want to stop participating in thievery, adultery, murder, and hate?
When you die still rejecting Jesus Christ, it is telling the Holy Spirit that you have ended your life still rejecting the light and the truth that he has been trying so hard to bring into your heart. That because of your harden heart and closed eyes and ears, you have turned your back on the Son of God and instead have decided that your life will end still on the side of satan and the world. This is a classic example of having a lack of reverence, a lack of respect, and a complete rejection of what the Holy Spirit has been trying to bring into your life. To die without Christ is truly blasphemy aimed directly at the Holy Spirit.
Looking at this in a little different perspective, ask yourself what are the very first two commandments of God? What two commandments did God put before all others? They are:
1--"You shall have no other gods before me."
2--"You shall not make for yourself an idol in the form of anything in heaven above or on the earth beneath or in the waters below. You shall not bow down to them or worship them. "
When you look to the world for your answers, when you put sin first, when you do the things that God says not to do, when money and power become the driving forces in your life, when all you can think about is alcohol, sex, or drugs, then you are putting other gods before Almighty God. And when you put these worldly things before God, they not only become more important than God, they become idols; idols that your life centers around. And they also become your spiritual death sentence if you should die still cherishing those idols .
If you still doubt this then let Jesus tell you himself.
Mark 12:28-30 "One of the teachers of the law came and heard Jesus arguing with the Sadducees. Seeing that Jesus gave good answers to their questions, he asked Jesus, "Which of the commands is most important?" Jesus answered, "The most important command is this. Love the Lord your God with all your heart, all your soul, all your mind, and all your strength."
When you put money, power, sex, drugs, or any other earthly thing before God, then you do indeed place idols ahead of God. If you should die and not have Jesus Christ as the most important thing in your heart, then that simply means that other, more worldly things are more important to you then God. And if you die still treasuring those idols then that is unforgivable in the eyes of God. Dying without God as the most important thing in your heart, is unpardonable. Dying without being in a Godly relationship with Jesus Christ is the height of disrespect towards the Holy Spirit, and is truly unforgivable.
So the three verses regarding the unforgivable sin that are listed above, can be seen to show that the unforgivable sin is not only a sin, it is a way of life. It is a lifestyle that is telling God that he is not wanted at all in a person's life. That his beliefs and teachings are nothing but unimportant trash. That the person would prefer to follow the teachings of the world and satan rather than the teachings of the Son of God, and most importantly, that the person wants to die holding on to these beliefs.
Committing this unforgivable sin is generally accomplished in two different ways with both of these ways going on at the same time. First, there is a deliberate choice taking place. That is in the sense that the person has harden their heart to God, and instead offers up his heart to satan and to the world. The lost person seals his conscience to repentance, and prefers to completely shut God out of their lives. The ways of God in this person's life are completely unwanted. The second way for one to commit the unforgivable sin is to simply stay in a state of continual neglect. Here a person fails to pray, or read the word of God, or have fellowship with Christian believers. They ignore God and completely block him from their thoughts and thus successfully prevent the Holy Spirit from making any headway into their lives. This person will soon find themselves drifting further and further from Jesus Christ. They will also find that their heart is becoming harder and harder.
There are two very good verses in the tenth chapter of the book of Hebrews which help explain this fatal refusal of the Holy Spirit, who is attempting to come into a person's life.
Hebrews 10:26-27 "For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries."
Hebrews 10:29 "How much worse punishment do you think will be deserved by those who have spurned the Son of God, profaned the blood of the covenant by which they were sanctified, and outraged the Spirit?"
Forgiveness can only be given to those who seek it and then repent, not to those who knowingly trample upon the truths and desires of God. The intentional contempt of the Holy Spirit, who is trying to bring Jesus Christ into a person's life, is a potentially fatal attitude to have.
Please remember that it is the Holy Spirit who teaches us, guides us, and instructs us. It is the Holy Spirit who is our helper and our educator. He is the one who opens up and talks to our hearts and minds. The Holy Spirit is responsible for urging and directing us. It is this guidance by the Holy Spirit that is going to bring Jesus Christ into your life and keep him there. The Holy Spirit is the one who educates and instructs a person in how to lead a life which is pleasing and approving to God The Father, and it is The Holy Spirit who tells the world about Jesus Christ.
So the Holy Spirit is a person and he is considered by God The Father and Jesus to be very, very important. If you let him he can easily become a very valuable friend, a friend who will always be with you, always guide you correctly, always be true to you. He is right next to you this very second. All you have to do is reach out, take his hand in yours, and ask him to be your friend. If you do, then suddenly you will have the most powerful friend you can imagine right by your side day and night. A faithful and trusted friend who is always ready to help, a friend always ready to protect and defend, a friend who wants desperately to lead you to Jesus, and a friend who will very willingly guide you, step by step, right into eternal salvation.