Is Blasphemy still wrong, and what is it exactly?
How careful should you be with your language and why is that important?
Blasphemy is simply profaning the sacred. It's a sin in that exhibit animosity toward God and the things of God through blasphemy.
But blasphemy isn't simply language, it is also thought and behavior. Refusing to love our neighbor is an act of blasphemy, since our neighbor is made in God's image.
Blasphemy is not some kind of "super sin", it's just a sin. And like all sin causes injury. God isn't going to get all angry and smitey because someone blasphemes, God's disposition toward sinners is found in His grace and love through Jesus Christ. God has chosen the blasphemers, along with all other sinners, to be the objects of His loving affection and salvation. That's the Gospel. God wants to restore us to a place of loving friendship, and thus to deliver us out from our blasphemy, so that we may enjoy the fruits of God's kindness, both in this life and in the life to come.
Arguably the greatest blasphemer Jesus tells us about in His parables is the prodigal son. When the prodigal son came to his father to demand his inheritance now, he was telling his father, "You are dead to me".
When the prodigal son in his deepest lows--living in garbage with pigs--he decides that maybe he can convince his father to take him back, not as a son, but as a slave. And so the son rehearses his speech on the way to his father's house.
The father sees his son coming over the horizon, and then rushes out to meet him. The prodigal son tries to speak, but the father embraces him, kisses him, and then tells the servants to go fetch his finest clothes and to prepare the most elaborate feast.
The father does not hold a grudge. The father doesn't hold what the son did against him, but embraces and loves him.
Jesus tells us this story to tell us about the kind of Father God is, what God's love is like.
Even to the one who curses God to His face, God will hold no grudge, but rather God rushes out to meet him and embrace him, and then clothe him with the finest clothes and throw the most elaborate feast. That which was dead and lost has found life, healing, kindness, and the super-abundance of love in the arms of the Father's embrace.
"
How deep the Father's love for us
How vast beyond all measure!
That He should give His only Son
To make a wretch His treasure!"
-CryptoLutheran