How about I steal a lot of art supplies from our high school art department?
Oh no! Please dear, tell me you don't really want to. Why do you need art supplies?
I need them to spread the gospel of Jesus
Wanting to share your beliefs with others is normal but stealing to do that is wrong. You could get expelled.
They have so much art supplies that they don't need, I can take some and still not take too much.
How about you don't do anything of the sort, stealing is always wrong no matter who has what of so much. You will be caught, then what happens? You will be put in jail, so stop thinking you are right in stealing anything.