What is Paul's aim, after the war? Chapter 8-9

From the text:

I want to think myself back into that time. It is still in the room, I feel it at once, the walls have preserved it. My hands rest on the arms of the sofa; now I make myself at home and draw up my legs so that I sit comfortably in the corner, in the arms of the sofa. The little window is open, through it I see the familiar picture of the street with the rising spire of the church at the end. There are a couple of flowers on the table. Pen-holders, a shell as a paper-weight, the ink-well--
here nothing is changed.

It will be like this too, if I am lucky, when the war is over and I come back here for good. I will sit here just like this and look at my room and wait.