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A couple years ago I spent a large amount of energy trying to develop TK like this. I'm pretty sure that the issue is just faith. Every time I tried to go through a long, drawn-out process of preparing some intricate etheric form that would utilize some mystical principal to cause movement, nothing would happen. My most successful moves were done in the spur of the moment without thinking about them. For instance, I was able to achieve a physically 'impossible' move of pushing a square object an inch across the floor just from trying it on a whim while I was watching the scene in ET where the alien uses telekinesis to move things around. 

> For example, I can reliably cause one of the listed feats in proximity, but it's 1) really weak, 2) depending on the feat very dependent on time and 3) unreliable because of some poltergeist disturbances
At first I assumed that this was a result of the etheric energies being too weak to affect dense physical matter, but I changed my mind on this after having a few dreams where I tried to exercise overt magical abilities but was met with these same limitations. Since the dream was taking place on the astral it should not have been effected by any huge energetic threshold that would cause such fettering, so this led me to conclude that the bottleneck exists entirely or almost entirely in the subjective frame of mind. 
An exercise that may help to illustrate this a bit better is to keep your body entirely still and examine closely how the thought and intent of you moving a body part or standing up or something gets translated from a thought into an actual physical action. Just thinking 'hard' isn't enough. There's this sort of faith-flow that you engage in. I think that's probably the key.