Once we become a master, we end the chain of births and deaths. Our particular course on the earth becomes completed. We dont have to be born again. However, we may come to the earth... now and then... to teach others, or to be an inspiration for others. On the successful completion of our human experience, we get promoted to higher worlds. We may begin to create our own under-selves. We may even create new worlds, new planets, new galaxies... depending upon the amount of our personal energy.