This is wisdom from your Lord. Begin and end with tawhid.
The list closes where it opened
Ibn Kathir explains that everything commanded is good manners and everything forbidden is an evil quality, revealed to the Prophet ﷺ so he could teach the people. The warning against shirk returns at the end, blamed by one's own self, by Allah and by people. It is addressed to the community through the Prophet ﷺ.
You can be kind, honest and generous for many reasons. Reputation. Habit. Upbringing. The verse ties all of it back to one root. When you do good for Allah, it holds even on the days no one is watching.
Being a good person has nothing to do with what I believe about God.
Good manners are wisdom from Allah, and they stand firmest on believing in Him alone.
Before one kind act today, quietly make the intention that it is for Allah.