Have we already lived? And we'll come again to live in the future? According to the reincarnation theory it is so, because the soul would periodically appear in a series of successive bodies. This theory is actually the basis of many religions and philosophies: in India from Vedic beliefs, from ancient Egyptians, from the Buddhist view of life and from American Indians also.
Karma is the law of cause and effect which induces the soul to incarnate. According to the concept of karma in this life would be the result of our actions in past lives and this life, with its choices and its facts, would lead to what will be the future life. So each of us would return to live on the material plane until reached the perfection of the soul and can therefore leave the cycle of deaths and rebirths. On this basis the soul, when is going to be embodied, after examining its past lives, would search for a type of existence which fits best as possible to what is yet to be matured and learned.
The various lives are therefore not separated from each other, but are linked by a kind of Ariadne's Thread that unwinds continuously over time and space. This explains certain spontaneous attitudes, that are often innate abilities that were acquired earlier, or the repetition of certain patterns from which it seems impossible to escape because, most likely, they are deeply rooted in a previous life, or friendship and love at first sight between two people who should represent a real recognising themselves from past lives.
The moment a soul enters the material plane through the body the person forgets his past because it would be a too heavy load to carry around and would not allow persons to live the present life at its maximum, but sometimes certain memories may resurface spontaneously to mind, perhaps visiting a certain place or meeting a certain person.
There are also techniques that stimulates these memories of previous lives and that may help solve a deep-rooted phobia, a complex interpersonal relationship, or to understand themselves better. These includes hypnosis or oriental molded meditation techniques that allows to enter a much larger field of consciousness.
Regression into past lives - is a guided journey to discover your past lives. Out of curiosity, or even to resolve karmic issues that block your present life, but which were born in the past. In fact, living again the moment when the block was born, discover in what context and what caused it has a powerful capacity for emotional release, albeit with less emotional intensity in the regression, due to the fact that you can live the moment as an outside observer, recognizing as yourself in that life while being away from it as no longer involved "directly" in contexts that you are watching.