so maybe the cause of that wanting is my thought or my unconscious belief that that is the best for me and that it is the best option, and the cause of that thought or that unconscious belief is myself, because those thoughts arise from me.

Your thoughts (and conscious desires) are a combination of your physical brain (hardware) and your sensory input (also hardware) and your memory (also hardware) and your instincts (firmware) and your ideas and concepts (software).