When we change our attitudes, we change the way we see the universe around us.
I'm sure that's true, it's almost a tautology, but I read the OP to be stating that we don't merely change the way we see it, we actually directly change the universe itself. Neither case is really the Law of Attraction either. The Law of Attraction is a belief that your attitudes, motives, and intentions draw people to you with similar attitudes, motives, and intentions. More broadly it could be stated as "like attracts like:" if you're negative, negative things will happen to you (blame the victim), if you're positive, positive things will happen to you. In one sense that's trivially true, as I pointed out initially, we tend to hang around with people who share our views and avoid people who'd argue with us all the time. Thus one of the major peddlers of this nonsense, Gary Zukav in his book
The Seat of the Soul, concludes that angry people's lives will be filled with angry people, greedy people's lives will be filled with greedy people, and so on, and he indicates we should learn to trust the universe to take care of our souls. Whatever that might mean.
But a moment's thought should show you that the Law of Attraction is false, as I also tried to point out initially. Sellers don't attract other sellers, they attract buyers. Grieving, vulnerable people don't attract other grieving, vulnerable people, they attract supportive friends and relatives who care about them, and vultures and con artists who try to take advantage of them. The New Agers would probably say--in fact I know they would, I've heard them say it--that grief and vulnerability are negative, so that example supports the Law of Attraction, but that kind of argument makes it impossible to verify. The Law means nothing at all if such obvious contradictions of it can get torqued around to support it. Typical New Age magical thinking: don't bother us with evidence and reason, we know what we know. Well, no they don't. They know what they want to believe, which is quite a different thing.