The promise of change becomes more believable through ordinary situations handled differently.

Announcements of change persuade nobody for long, including the person making them. What convinces is the small unremarkable occasion, the moment that used to produce the old response and this time produces something else. Those occasions are the actual evidence, and they accumulate slowly, which is why patience is reasonable on both sides.

If you are the one changing, stop explaining and let a few plain instances accumulate. If you are watching someone else change, look at the small moments rather than the declarations, and give it long enough for a real pattern to appear.