I'm probably going to steal a tip jar tomorrow from the cafe
Why do you need to take the tip jar?
I want to feel grown up.
Part of being mature is following the law. It is wrong to steal from others. Please consider their tips are their livelihood.
I'm stopping myself.
It is good that you are realizing that it is wrong to steal. I think that stealing the tip jar would have just made you feel guilty for the people you stole from.