6.  Ephesians 4:30-32

30 And do not grieve the Holy Spirit of God, with which you were marked with a seal for the day of redemption. 

31 Put away from you all bitterness and wrath and anger and wrangling and slander, together with all malice, 32 and be kind to one another, tenderhearted, forgiving one another, as God in Christ has forgiven you.

                We can only grieve a person.  We cannot grieve an active force.  We can grieve the Holy Spirit by our words and actions, just as we can grieve any person.  The Holy Spirit is a Person, not just an active force, who can feel grief over our thoughts and behavior.

                We grieve the Holy Spirit when we are not "kind to one another, tenderhearted, forgiving one another."  The Holy Spirit indwells every believer.  We are sealed with the Holy Spirit.  Therefore, when we treat a fellow believer, who is indwelt by the Holy Spirit, with bitterness, or wrath or anger or wrangling or slander, or malice, we grieve our brother or sister in Christ and we grieve the Holy Spirit too.