Rebirth, if restricted to the physical mechanism, adds little meaning to our lives, as it becomes an endless repetition of births with no goal other than pure existence. This leaves the questions about the significance of life and the reason for existence unanswered. Once we couple this physical mechanism with the concept of a soul evolution, a continuously progressive development that utilizes rebirth as the means of achieving results that cannot be attained in any single birth, we have the key that fits virtually all the locks, and we open up a new understanding about why we are here, and what we have to do.
Sri Aurobindo states the case in a concise manner: “But the perception of rebirth as an occasion and means for a spiritual evolution fills in every hiatus. It makes life a significant ascension and not a mechanical recurrence; it opens to us the divine vistas of a growing soul; it makes the worlds a nexus of spiritual self-expansion; it sets us seeking, and with a sure promise to all of a great finding now or hereafter, for the self-knowledge of our spirit and the self-fulfilment of a wise and divine intention in our existence.”