The preacher has to talk down to people and this surprises you?
You don't understand a frigging thing you ever read, and that surprises me not at all.
You just said it was like a Sunday school class. So he was talk8ng down to people. What don’t you get?
Why you think you're in any position to feel superior to any other living creature on Earth, and why you think anyone is interested in listening to you delude yourself about it.
And no, dear, he wasn't talking down to people. I would object to that, were it the case, but in this case I'm objecting because he actually didn't have any deeper revelation to offer. Man's halfway to ordination, and he's no more advanced in Christianity than a children's Sunday School class. I have a problem with that.
Admittedly, I've been very spoiled. Two of the three long-term pastors in my life routinely made reference to things like the meanings of key words in the original Greek text (or Hebrew, or Aramaic, or whatever was appropriate) and classical philosophy and theologians like Saint Francis de Assisi. At the very least, I would expect the guy to cross-reference to other relevant places in the Bible which explain what God DOES expect us to do, as Christians, about envy and covetousness.
I'm afraid, "Psychology Today tells us that envy is an emotion which occurs when a person lacks another's superior quality, achievement, or possession and either desires it or wishes that the other lacked it" is not really gonna cut it for me spiritually.