"Thou shalt not murder."
"You shall not bear false witness."
"You shall not speak the lords name in vain."
"You shall not commit adultery."
"You shall not steal."
They are all important
They are important because if you don't follow them you will die in seven days.
They are important because pastor said they are.
They aren't important.
They are important because you aren't supposed to do bad things.
They are important because they were given to the people from God, and if you didn't follow them you were condemned.
Here's an interesting quiz for you.