past lives

i was reading in a book i have that it is possible to enter the cards to discover who we were in pastlives. is it a form of astral projection? and can you go into the future as well as the past?

no, it is not astral projection.
to enter any place or time you must project yourself there through self-hypnosis.
you must first understand that anytime you are dealing with the past, such as past lives it can be very painful. this is why when we are re-incarnated we come back with a fresh slate, no memory of our past lives.
the one reason for this is;
each life lesson is to teach us to be the best we can be, to understand not just master our skills. if we came back with memory than we would not learn anything.

so when searching to learn about ourselves through past lives we must always remember not to view it as a place to pick up where we left off, but to view as a movie for better understanding and nothing more. because what most people forget is that the past can not be changed.
can u see why coming back with a clean slate is important.

yes, past lives can put a better persective on things that may be troubling us. yet it has it's down side as well. by this i mean if we focus on a past event how can we not expect to repeat the same event again from happening the same way when that was not the reason for repeating another life.
let me bring more clarity to this by saying that each life brings different life lessons, not just for those around us but for ourselves as well, thus the reason for a clean slate.

now the reason for being able to delve into our past lives is to be able to fix an event that needed to be rectified. that is when we get glimps of the past or deja ~vu, this is spirits way of telling us we must delve into the past to fix the problem at hand.

so in other words the GODS gave us limited abilities to see the past.