A good apology can change the temperature of a room. It names what happened without making the hurt person prove every detail again.
But relief is not the same as repair. If the same interruption, joke, or broken agreement returns unchanged, the apology begins to carry less weight no matter how heartfelt it sounds.
An apology explains the past. Change makes a claim about the future.
Completion looks practical: a different tone at dinner, a calendar reminder made without being asked, a pause before the familiar defense. Small evidence is still evidence.
No one changes perfectly. The question is whether the direction becomes visible enough that trust has something new to rest on.