One eternal or unforgivable sin (blasphemy against the Holy Spirit), also known as the sin unto death, is specified in several passages of the Synoptic Gospels, including Mark 3:28–29, Matthew 12:31–32, and Luke 12:10, as well as other New Testament passages including Hebrews 6:4–6, Hebrews 10:26–31, and 1 John 5:16.
In Mark 3:29 Jesus says that “whoever blasphemes against the Holy Spirit will never be forgiven; they are guilty of an eternal sin.” Matthew's account adds that even blasphemy against the Son of Man will be forgiven, but not blasphemy against the Holy Spirit (Matthew 12:31–32).
And whoever shall speak a word against the Son of Man, it shall be forgiven him; but whoever shall speak against the Holy Spirit, it shall not be forgiven him, either in this age, or in the age to come." The same idea that blasphemy against the Holy Spirit is unforgivable is found in Luke 12:10 and Mark 3:29.
Therefore, when others ask, “Can a Christian commit the unpardonable sin?” the clearest answer is “no,” because to be a follower of Jesus is to believe and accept the testimony of the Spirit – that Christ is Lord – which is the exact opposite of the Pharisees' response.
"If you say something like 'Oh my God,' then you're using His name in vain, but if you're saying something like OMG it's not really using the Lord's name in vain because you're not saying 'Oh my God. ' It's more like 'Wow.
In Jewish law the only form of blasphemy which is punishable by death is blaspheming the name of the Lord. The Seven Laws of Noah, which Judaism sees as applicable to all people, prohibit blasphemy.
Matthew 12:31-32: “Therefore I tell you, every sin and blasphemy will be forgiven people, but the blasphemy against the Spirit will not be forgiven.
Saying offensive things about God or religion is blasphemy. Blasphemy can be used for offensive ideas in other areas too. If you're saying something bad about a god, or taking the Lord's name in vain, or questioning a religious institution in any way, you could be accused of blasphemy — insulting something sacred.
“Oh my God!” The expression, once considered taboo in polite conversation, has become as commonplace as “that's cool” or “see you later” in American parlance. The acronym, OMG, is nearly as ubiquitous.
Blasphemy, in a religious sense, refers to great disrespect shown to God or to something holy, or to something said or done that shows this kind of disrespect; heresy refers a belief or opinion that does not agree with the official belief or opinion of a particular religion.
The consensus of theologians has been that the second commandment forbids deliberate misuse of the name of God. Such misuse would be false oaths or using the name of God in a hateful or defiant manner. The context of “Oh my God” makes all the difference.
Sometimes, the lord in oh my lord is stylized as lawd, a historic pronunciation of lord now associated with AAVE. For many Christians, saying oh my lord may be considered offensive, a possible instance of taking their lord's name in vein. One humorous substitute includes Oh, Mylanta!, a minced oath popularized by D.J.