The number seven has been proven to cause favourable outcomes throughout magic. I have texts on the matter, if you must borrow them.

In all honesty I don't care about luck, whether or not it exists. I care about solving problems, and the fact that there is only positive in Arithmancy is a problem to me. It doesn't add up.

Was there another point to this other than to debate with me over what I may or may not believe in?