That’s something I don’t understand about some Christians. Is there no conviction when they talk like that? Because as a Christian, the Holy Spirit will convict you the moment you speak foul.
It is written in Ephesians 5:26-27 that Christ cleanses the church with the washing of water by the word, that He might present her to Himself a glorious church, not having spot or wrinkle or any such thing, but that she should be holy and without blemish. Yes Christ did it all through the shedding of His blood. Do we now continue as always and there is never a change? No! God changes us through His word. You read the word of God and those truths hit home and you are convicted and you start to change, in time comes a change that people notice, especially from what comes out of your mouth (or what you type on the internet!).
Christ said in Matthew 15:19 that it is what come out of our mouths that defile us, because it comes from our hearts from where come evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies. These are the things which defile us. With the help of the Holy Spirit, God’s word changes us.
From our bellies will flow rivers of living waters. That is the Holy Spirit flowing out of our hearts to bless others. Now how can we as Christians be cussing and at the same time be a blessing with what comes from our heart, when what comes from our hearts are foul and not from the Holy Spirit?
In Jesus’ Holy Name we pray.