And no, "But science is sooooooooo mysterious, we can't know for sure..." is not a legitimate argument. REAL science states that you DO NOT believe that something is true UNTIL it has been positively proven, NOT that you treat as if it is because "maybe." And no again, doing so is NOT "keeping an open mind" - keeping an open mind means accepting things for good reasons, not "just because." That's called "being a gullible sucker."
Although not concrete evidence that thoughts are capable of manifesting desires or even being capable of travel in waves through space and time, the messages within literally all religious literature still give plenty of food for thought. Even buddhism constantly stresses the importance of right thinking due to the fact that thoughts create reality as you can see by these 2 quotes: 

The Law Of Attraction Manifestation


The Law of Attraction is one of the better known universal laws. The theory behind the Law of Attraction is that we create our own realities. Not only do we attract things we want,  we also attract things we don't want. We attract the people in our lives, the stuff inside our homes, and the money in our bank accounts through our thoughts and feelings.
In his 1910 The Science of Getting Rich Wallace D. Wattles espoused similar principles — that simply believing in the object of your desire and focusing on it will lead to that object or goal being realized on the material plane (Wattles claims in the Preface and later chapters of this book that his premise stems from the monistic Hindu view that God provides everything and can deliver what we focus on). The book also claims negative thinking will manifest negative results.[56]
Rhonda Byrne published in 2006 the film The Secret wherein she emphasized thinking about what each person wants to obtain, but also to infuse the thought with the maximum possible amount of emotion. She claims the combination of thought and feeling is what attracts the desire.[27] The Secret says your subconscious mind can control everything that happens around you, including both positive experiences, like having someone call you from miles away, and negative experiences, like death. The Byrne underlines the power of the subconscious mind by asking the reader to take full control of these thoughts, in order to achieve things in life, with the mind, as much as with action. Another similar book is James Redfield's The Celestine Prophecy, which says reality can be manifested by man.[28] Man and the universe have a force of attraction between them similar to a magnetic attraction. The Power of Your Subconscious Mind by Joseph Murphy, says readers can achieve seemingly impossible goals by learning how to bring the mind itself under control. The Power by Rhonda Byrne, The Alchemist by Paulo Coelho, and The Power of Now by Eckhart Tolle are similar. While personal testimonies claim the secret and the law to have worked for them, a number of skeptics have criticized Rhonda Byrne's film and book. One New York Times book review calls the secret pseudoscience and an "illusion of knowledge".[29]
"Though this may seem counterintuitive, my advice toward manifesting your ideal relationship is to spend plenty of time really getting to know yourself first," Amanda Dobra Hope, holistic life coach and pre-marital counselor, tells Bustle. You can do that by writing in a journal, meditating, or standing in front of a mirror and asking yourself questions about how you feel and how your day is going. Once you really know and love yourself, it's much easier to attract the healthy, positive, and long-lasting relationship that you really want.

The Law Of Attraction Deepak Chopra


When things aren’t going well, the Law of Attraction is something that should be paid attention to because you attract to you energies that are a reflection of what’s going on inside you. To be more specific, what’s going on outside is actually a barometer for how things are on the inside. This is the best time to focus in on what you are attracting to you as a pattern and create a pattern interrupt.
You are describing how it is desirable to have the good and bad. Death is good. Aging is good. Disease is good. I don't necessarily disagree with your premise. However, these are not the things that people typically want or desire to fill their lives. When you talk about creation and destruction being natural phenomenon, I agree. But invoking the law of attraction should stop the destruction part if that's what I want to attract. This is irrespective of it being objectively good or bad.

Is Manifest Like Lost


Kabbalah teaches that the manifestation process requires moving through the thought and feeling of having your heart’s desire and also taking action. Sometimes you don’t get what you want simply because you don’t bother to do anything—like send out a resume, join a singles group, or save money for a new car. Be sure to take action in addition to focusing your thoughts and feelings on your desire. In fact, the effort that you put forth create what you want through your action is seen by the Kabbalists as the most important aspect of the manifestation process.

Set your manifesting goal. Get crystal clear on exactly what you would like to create, do, be, have, or experience. Then work those imagination muscles. What would it look like if you already had that, if you were already living it? What would surround you? Who would be with you? What would you wear? What would your bank account reflect? How would you spend your time?

Each one of your thoughts is a unit of mental energy mostly composed of electricity. Electrical energy is focused direct energy. On the other hand, the energy powering your feelings or emotions is mostly made up of magnetic energy. Magnetic energy either attracts of repels. The combination of thoughts + feelings creates a subtle electromagnetic field which cannot be seen but can be felt and even measured.
What does it mean to manifest hopes and dreams in your life? The idea of visualizing something we want, and attracting it to us, is an ancient principle of life. Some choose to pray, while others chant, meditate, visualize or create affirmations. Yet, the never-ending tragedy of global economic catastrophe, volcanoes, oil spills and war has beaten many positive thinkers right down to the ground, and taken a tremendous toll on our collective psyche.

If you’re practicing the technique on something bigger, this exercise may be tricky, but use your imagination. If you’re trying to lose weight, go out and buy an outfit that fits the size you’re aiming for. If you want a new car, go to a dealership and shop around. If you’re aiming for something as big as complete financial freedom, start planning what you’re going to do with all that free time and money.
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

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