On your part, you and your descendants after you,
must keep my covenant throughout the ages.
To be faithful is a key to success. It means to be faithful towards God and people. Moreover and also very important to be faithful to oneself all the time. Therefore, there are two commandmends: you should be faithful and love your God and people. However, it is very difficult if you do not love yourself and are not faithful in your vows.
God and people around you want to help you, but first of all you need to prove yourself faithful. Furthermore, each of us makes promises either to God or to friends, or to oneself every day. And we are great if we are able to fulfill these promises, but very often we are too week to do so. Nevertheless, God always is faithful and ready to come with help even to those who are unfaithful.