The concept of the spacetime originates from the relativity of physics, and it implys that space and time influence one another. Thus, anyone who wants to discuss space or time must use this idea—spacetime. In theology, however, too much attention is focused on time, too little attention is placed upon space, and even less attention is placed upon spacetime—where space and time are seen as a whole.
Therefore, this aroused my interest to talk about spacetime. First, the theological significance of time and space is found through the discussion of Jürgen Moltmann's concept of time and space. Through the systematic discussion of the history, culture, and theology, a model of space and time is constructed and so is its theological significance. The theological significance of time is the actions and promises of God in history, and it is faced by people through remembrance and hope. The theological significance of space is the "being", a space that accommodates "being" and is filled by "being" and letting this "being" live.
Next we find the integration of space and time from Jürgen Moltmann's concept of the heavens and the earth, and finding that space and time are the essence of the heavens, and that space and time are mutually related, which therefore leads us to the concept of spacetime and the concept that spacetime is a quality that is both in the world and in God. Through the significance of space and time, we find the significance of spacetime.
Lastly, these concepts are portrayed by the experience of “returning home”: for the displaced person, returning home is not only a hope in time but also a hope in place. When the person returns home, they will find their satisfaction and enjoyment in the "being" of home. The most satisfaction and the most enjoyment may be found in the coming of God, so we find the theological significance of spacetime: intimacy.
Thus, God's coming in spacetime is a deeper understanding, deeper feeling, and a real satisfaction. In the concept of spacetime, God interflowing with people represents God's intimacy with people. This intimacy in the experience of the faith has started from Jesus' incarnation, death and resurrection, and it is experienced in the Holy Communion, and it is filled with the coming of the new heavens and the new earth.In short, the significance of spacetime in theology is not only a model of describing the world but also theology in practice.