Magic Forums

Good evening,
I'm hoping someone here can answer my question. I'm of the strong belief that every intention or spell has a cost, be it to provoke something positive or negative. Does anyone know which kind of branch of magick this could fit into?

A bit more info:
In a way, it's kind of the opposite of the belief that everything will come back threefold. It's been my experience that regardless if I want something good to occur, I am also giving something up in return to keep the balance. It's made me hesitant for years to really get into practicing, because I'm afraid of the consequences.
So I'm hoping that by finding the branch that shares this belief, they might also have a solution for this problem.

I look forward to your replies.
Best wishes,
Mond