We all wonder about questions like these. The problem is that we never seem to find the time to ponder them enough, and we spend most of our lives with a vacuum inside us that is yearning to be filled. A vacuum that is there, in our subconscious, demanding attention, but which we ignore because it is too difficult to face up to it. So we turn, instead, to the easy, sugar-coated answers like spiritualism, reincarnation, meditation, clairvoyance, and religious texts that were written a long time ago and which have been modified by persons unknown over a vast period of time. Or we simply try to forget the questions and concentrate instead on living a somewhat hedonistic lifestyle---and there is nothing wrong with that. Absolutely nothing, if that is what suits you.
However, if there comes a time when you want to know more, from people who have promised to give you only honest answers based on their own, painstaking research, then you might want to try a book such as this one. I will promise you an honest ride. I will not promise that you will always find the ride easy. All I can say is that arriving at these answers has given me a profound sense of peace. Whether it will do the same for you, I cannot say, and it would be dishonest of me to tell you that it will in the hope you will buy my ebook.