These commandment make the life of monks or anyone who has right understanding and do follow the Buddha's teaching will has holiness and peaceful life. From this peaceful life you will reach right concentration and enlightenment to own born, old, sickness, death and end of reborn.
Everything is impermanent and changed in every moments. Therefore nothing is you, is yours and is your ego.
Commandment is a teacher. There is commandment, The Buddhism is still alive. There isn't commandment, The Buddhism lost.
Buddhism is humanistic ethics of human. Buddhism brings light for everyone by right understanding about real nature of life. And you are the person who will lighting your life by your right action so that it's useful for yourself, for others and for beings.