We all live in a (3+1) dimension, we are able to travel 3 dimensionally while living in the 4th Dimension. That means, to ever do Time Travel or travel 4 dimensionally, we have to be in the 5th dimension.
In the 5th Dimension, we would perceive each instants/moments of time right in front of us. However, at that moment we would not be in our physical form, it would be our mental of psychological form, our "True" form, we would be "Mind".
Maybe inside our Dreams, we actually are in the 5th Dimension, where we are able to perceive multiple possibilities for a single event. However, we remember dream as a 3 dimensional thing because that's how we perceive things right now.
Dreams are not an illusions, they are our "True" form. Mind is our True form.
That's just my theory.
- SIDDHARTH