For some magick is very much an act of faith. Theres a difference between not being able to accomplish something because its impossible to do or not your place to change and something that seems beyond you but takes some good old fashioned know how and hard work. I always use a little rule method before I do any work. Ask yourself these questions.
Air: Should I do the work that I want to do? What are the possible consequences good or bad? How will this affect me or others around me?
Earth: Is the work I want to do possible? Is it within the bounds of reality? Does it flow with the natural path of the world or does it go against the natural path?
Fire: What is the best way to get what I am working for? Does it involve ritual? Does it involve guidance from the spirits? Does it require me to play a role I'm not used to playing?
Water: What are the results? Have I seen success? Is it success in the way I envisioned it? What is the next step if any?