Yes, there are people who have the ability to help you see your other lives, but that is only because you give them the power.  You have the power to explore any of your “past” lives yourself, and all lives are occurring simultaneously, in the Now. But based on how you feel about your own power, you may give a regression experience more validity with the help of a “trained professional.”

Also see “do you believe in past lives.”

Yes. Yet since everything is happening instantaneously they are all going on right now.

Here on the physical plane, we have collectively agreed to add a time factor to our physical existence. This is so we could insert ourselves into a certain point of Earth’s expression, to experience a specific set of circumstances.

There is only a very small portion of you that is in your physical vehicle right now.  The majority of you is non-physical, existing in the form of sentient energy, which is living other lives, in other realms, simultaneously.

Since you desired the experience of a seemingly-solid reality, you “separated” some of your energy from the whole, slowing down the frequency until it appeared solid.  This is the physical “you.” You are never really separated, but you gave your physical body the sensation of being separate from other things, so that you could interact with them using your five senses.

When you are finished with this experience, your energy will coalesce again in the non-physical, leaving your body behind to return to the physical earth; and back into the All That Is (that’s you too!).

You will then remember your native essence as the creator of your reality; and you will continue creating yourself in any way you desire, whether that be further incarnations in a physical body, or in a non-physical one. Your personality remains, now expanded from your recent incarnation.

Recommended book for more information:

Neale Donald Walsch: Home with God: In a Life That Never Ends

Yes, you do.

Prior to your current incarnation, you settled on a particular theme for your next life. You then chose fellow souls to be the major actors in your next incarnation, including your own parents.  Soul plans are always a collaborative relationship; the other souls also have their own themes to explore, for which you are doing them a service in kind through your interaction with them. Your chosen parents would provide you with the early growth experiences and scenarios that set the stage during your early years.

Our Universe’s natural state is one of balance.  You might also hear the word “karma” thrown around here and there.

Karma is another word for self-imposed balance. In order to maintain balance as our souls progress back to Source, we may choose lives with opposing themes in order to balance out the growth experience.

For instance, one could choose an incarnation in which he distorted the concept of “oneness” by playing the part of the perpetrator, narcissist, or physically oppressive individual. Then, in another life, he could choose to explore a theme in which he experiences being the “victim,” or the recipient of actions from negatively focused individuals.

Living lives on both sides of the dualistic spectrum allows a soul to experience the feelings, emotions, pain and joy associated with viewing life from very opposing paradigms.