Faith, shata te shada is a word which goes very deep. It means that there is this ultimate reality. What these books say, it's true. Not only that, faith in oneself. I can do it. They realized too. And i will realize too. This faith as you believe. So you are, and it works directly. Whatever you believe, if you believe yourself to be free, you will be free - because actually you are free. That is, you will feel that you are bound. The first thing thats ed a swami, veveka, in the catopinisa far is, the boy in achike time, because he had faith