you then who teach others, do you not teach yourself?

Romans 2:21~24
you, then, who teach others, do you not teach yourself? You who preach
against stealing, do you steal?
You who say that people should not commit adultery, do you commit
adultery? You who abhor idols, do you rob temples?
You who brag about the law, do you dishonor God by breaking the law?
As it is written: "God's name is blasphemed among the Gentiles because of
you."

I teach my pupils at ELS and at Church.
But, do I live by what I teach?
I preach against many bad things like stealing, lying and commiting adultery, and for many good things like studying Bible, praying hard and telling people Jesus Christ.
But, do I live by what I preach?
Aren't I a spoiling man among the believers by blaspheming God's name?

I often find myself behaving in opposition to telling.
It's not big one, but one of those - I preach to keep the Sabbath with these reasons that its God's day so we should worship him and also we should take a rest at least one time after 6 days.
I don't fulfill the second reason. Some could say, working for God on the Sabbath can be a kind of relax.
I agree with it. Yet, I'm not able to stand up on the level.

Only hope I do is to be a mere christian not blaspheming His name.