Humanity didn’t cease to exist but had their relationship with God severed. Jesus came to restore that relationship and give us new “life” as a result of His work and sending the Holy Spirit to indwell believers, thus reconnecting that which was lost.
Now for a believer to talk or behave so as to be a fountain of anger, hate, malice, unbelief or anything that works to tear down God’s church or God’s children (Eph. 4:29-31) resembles “death” or separation from the way of God. This of course causes the Holy Spirit to be grieved and mourn. The Holy Spirit lives to enable us to reflect the Lord’s presence and facilitate the kingdom’s presence here on Earth. The Holy Spirit is working to bring glory to the Lord and if we, by our words or actions, work against the Holy Spirit then He is rightly offended and grieved. Believers can cause the Holy Spirit grief, sorrow, pain and offense.
But, instead of grief, we can give the Holy Spirit joy. Paul wrote in Ephesians 5:10, 15-20: “… proving what is pleasing to the Lord … See then that you walk carefully, not as fools, but as wise men, making the most of the time, because the days are evil. Therefore do not be unwise, but understand what the will of the Lord is. Do not be drunk with wine, for that is reckless living. But be filled with the Spirit. Speak to one another in psalms, hymns, and spiritual songs, singing and making melody in your heart to the Lord. Give thanks always for all things to God the Father in the name of our Lord Jesus Christ.”