For Christians, praying is the concrete expression of their faith and embodiment of the invisible relationship with divinity. In the relationship between human and god, the faith that is expressed through prayers describes the mutual relationship between man and god. Praying is not merely a major way to maintain the relationship between god and human but also a way for individuals to transform their experience. How does such a transformation occur in praying? Here we will discuss how praying affects one's life experience and how the mental experience of praying embodies the relationship between human and god, including the construction of such a relationship, the language of praying, the process of self-transformation and the mutual answering between human and god in praying.