But if they don’t, there will be punishment and hardship.
Now, as John 14:23 and 1 John 5:3 say, if we love Him, we will obey His commands. There are similarities and differences. We don’t have promises after we obey, He fulfills… fulfilled His promise before hand: He sent His son and paid the price of our sin. It’s done.
Also, He doesn’t punish, but He does disciplines those He loves (Proverbs 3:12).
He can’t love us more or less though we can affect the state of our fellowship w/ Him. I compare it to how we love our children: nothing they do can stop me from loving them, but I can be hurt in the sense that I’m not as close to them in the moment. God is better than me, but you see my point.
Regardless of the deeper points, the message is from a high level: obey and things will be great. And what are His commands? Mostly, be nice, don’t murder, live clean, be honest, don’t worship other gods, etc. The commands are actually good for YOU.