Don’t grieve the Holy Spirit of God, in whom you were sealed for the day of redemption.
And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption. (18) A general precept against all excess of affections which dwell in that part of the mind, which they call "angry", and he sets against them the contrary means.
Paul speaks with apostolic weight: you must not live as the heathen do, whose minds chase vanities and whose hearts are darkened and estranged from God's life. You were snatched as brands from the burning; do not return to that smoke.
AI summary
Commenting on Ephesians 4:17-32
30. And grieve not. As the Holy Spirit dwells in us, to him every part of our soul and of our body ought to be devoted. But if we give ourselves up to aught that is impure, we may be said to drive him away from making his abode with us; and, to express this still more familiarly, human affections, such as joy and grief...