Bruce Lipton speaks about the two minds. This is the Conscious mind where you Ego exists. The Sub Conscious mind remembers your every thought, every action for you and your surroundings, so we can move through life fast without thought. It is very fast, a thousand times faster than the conscious mind and is hard to change, it is the past and the future, if the information is not true to you, If you had a very unsettling childhood, many of your beliefs were formed in the subconscious mind and actions are formed in that negative time. Change is possible. The conscious mind of self is the frontal brain and is the now moment. It is slow compared to the subconscious mind. Here we are able to change thought and belief. Society uses 1 % of the conscious mind and 99% of the subconscious mind. If you are wanting to change the past, and speed is what you require to heal the all-knowing, subconscious mind, Bruce recommends, Energy Psychology like Hypnosis, EFT, FMDR, Psych K, MEG. These methods reprogram energy in 15-20 min.  Living in your truth is extremely important, seek methods that can allow you to reprogram your beliefs so you can live in love, not fear. Something to consider.