I do not say it is possible to take your physical form and travel back in time. I don't think you can do that in mental forms either. Time travel is a myth to me. How can you reverse time? Besides, if you went back in time then the present (right now before you travel back) would be lost because it has not occured yet. If time travel was possible, why couldn't we travel forward in time? If you could travel forward then that would mean we have a pre-determined path in life and nothing is of our own free will.