without thought , with the simple resolve that had made him the last of them all , the last to continue marching on and on long after cuthbert and the others had died or given up , committed suicide or treachery or simply recanted the whole idea of the tower ; with the single-minded and incurious resolve that had driven him across the desert and all the years before the desert in the wake of the man in black , the gunslinger stepped through the doorway .