So why can't we perform miracles through thought?
Well, not yet, but perhaps one day we will. With advanced nanotech, integrating in our brain, we could be able to manipulate objects just like magic. Eventually doing things similar to miracles.
So, those teachings you are sharing I believe they are truth, they just take some time to manifest themselves, but eventually, they become absolute true.
Maybe the rate at which we manifest things is slow because we think time is real... I honestly don't know yet if this kind of stuff could happen quickly without technology, but some of these authors and yogis seem to think so. I guess the whole premise is that we have the power of creation where if we can gain understanding of the laws of the universe we can perform miracles disregarding time. All these spiritual teachers reference the Now, that there is no actual past or future, just Now, and the Now is timeless meaning there is no future or past, just memories and imagination.
Nanotech could get crazy though, I've thought about it a lot while brainstorming sci-fi stories to myself haha