If you want to know why and how reincarnation happens, let us make an experiment. Lie down, and see that the body, and above all the nerves, are completely relaxed. Then repeat, slowly and with attention, these words, trying as you do so to convince yourself that they are entirely true; “I abandon here and now all worry, all preoccupations, all personal will . . . I wash away all grief and regret, all spite and vengeance....I give up all personal love, all plans, all longings, and all hopes for earthly things.”
If you really try to be sincere in making these assertions, I defy you to speak the words without misgivings. Certain flame-hot fibers will revolt in you, will refuse such a surrender and contradict any such undertaking. Those are the threads that will drag you back to earth. Inevitably!
Spiritual states have nothing in common with your memories, or with the imaginings and intellectual interests of your earthly being; but those memories impress their emotional attraction upon your Ego-consciousness, and this prevents its liberation and causes you to return to earthly existence, by attraction, by the yearning for completeness. This is one of the most important aspects of the law of karma.