Some of the worst Christian
sects have been those which take the joy out of living, IMO. And many of those preach a different sermon to what Jesus did about how we should behave.
What did Jesus say about behaviour?
Love the Lord Your God with all your heart, soul and mind. And love your neighbour as yourself. And also,
Those who even think about sinning sin just as much (a paraphrase).
What I'm getting at is that it's not so much
rules anymore. The Israelites couldn't follow
rules, so there is no reason to think we can.

It's now more about
why we do something.
The apostle Paul put it nicely when he wrote,
I can do all things through Christ who strengthens me...but not all things are profitable. Why do you want to drink wine? As a refreshment? Fine. To get drunk? Not so fine. Eat meat sacrificed to idols? Only if it doesn't hurt your brother, if he has a problem with that.
You see what I'm getting at, BC? Jesus liberated us from the bondage of sin, and the slavery of keeping all those Commandments. But in doing so, he provided us with the Holy Spirit to help us understand what God's will is for us. In other words, how to behave.
We need help with behaving. I know I do, at any rate.
Cheers
Mick