I think many people use zen to mean “at peace”. A zen moment is one where everything feels ok.

All his bills are paid. His wife is healthy. In this moment, he’s at peace.

He demonstrates being content in the current moment, and being present in that contentment. This doesn't mean emotionless, but does mean recognizing that all states are transient - happy and sad. It also doesn't mean a lack of self-improvement goals, but may mean a lack of material goals. This is my understanding, as a Zen beginner.

"I read all that but like I say, every time I think seriously about it, my cat comes and swipes his tail across my face." In my mind, this is nearly a koan if you meditate on it.

The Walken Koan: A student approached the master known as 'The Weapon of Choice' while the master was dancing, and interrupted him to ask "Master, I read these many books on Zen, but I am not sure what Zen is. What is Zen?"

The master looked at the student and answered "I read all that but like I say, every time I think seriously about it, my cat comes and swipes his tail across my face." The master then resumed dancing.

Being happy and not desiring anything?