A Course in Miracles teaches that on some level, you’ve asked for everything that happens in your life. Your intentions create your reality. There’s no need to beat yourself up: simply recognizing how your low-level thoughts negatively affect your life is the first powerful step toward changing your experiences. Begin your manifesting process by getting honest about how your low-level thoughts, energy, and feelings of disbelief block you from receiving what you desire. Once you get clear about the blocks, you can begin to clean them up to clear space for positive manifestations to occur.
Call it luck. Call it prayer. Call it manifesting. Just don’t call it magic. If you were to pick up a book on manifesting, you might think that all you need to do is visualize what you want, then keep visualizing it, and visualize some more, and then—poof!—it appears. But in the world of Lacy Phillips, who has built her life and career around this skill, it is simple psychology. It involves understanding your childhood programming and your shame and reprogramming your subconscious beliefs; it requires work and action and vulnerability.
You claim that "positive thoughts always resulting in positive things" is not the basis of the LOA. In part you are correct. The foundational basis in science, as I alluded to in the article was that thought stuff particles travel through ether (not air) and interact with formless stuff to create whatever it is that you are thinking about. This was how "the law" started.

How To Manifest What I Desire