The pith, the essence of faith lies in this---a casting oneself on the promise.

信仰的核心和本质就在于此——以承诺塑造自我。

To pledge one's obedience to; impose (a vow or promise) upon oneself.

宣誓服从…；使自己(发誓或许诺)。

Angel tell wood, oneself want to read novel, but the wood have to see profession book, because of learn good profession lesson just have good result, the wood gladly promise.

天使告诉木头，自己要看小说，但是木头必须看专业书，因为学好专业课才有好成绩，木头欣然答应。

But the present, I could not but tenacious renege on a promise for oneself initial that.

可现在，我不得不为自己最初的那份固执而反悔了。

The person of honesty have to keep promise to oneself, his end powerful supporter be sincerity.

诚实的人必须对自己守信，他的最后靠山就是真诚。