question:  Why did Zarwell deliberately inject himself?
context: [p 135 ] By CHARLES V. DE VET monkey on his back Under the cloud of cast-off identities lay the shape of another man— was it himself? Illustrated by DILLON HE was walking endlessly down a long, glass-walled corridor. The truth lurked in some corner of his consciousness, but it was not reached by surface awareness. [p 136 ] Two men hurried through a doorway of a small anteroom to his left, calling to him. At the first turn he saw that the aisle merely circled the stairway, coming out into the depot again on the other side. It took him only a few seconds to push the case into the compartment, lock it and slide the key along the floor beneath the locker. But the fact that they had been expecting him meant that others would very probably be waiting outside. The office window was open, but it let in no freshness, only the mildly rank odor that pervaded all the planet’s habitable area. The floor beneath Zarwell’s feet assumed abruptly the near transfluent consistency of a damp sponge. It rose in a foot-high wave and rolled gently toward the far wall. The floor continued its transmutation, and Zarwell sank deep into viscous depths. ZARWELL found himself standing on a vast plain. Zarwell grunted acknowledgment and pushed himself to his feet, apparently unaware that his shirt clung damply to his body. Zarwell was careful not to rest his hand on the flesh searing surface of the stone. Zarwell passed a group of smaller children playing a desultory game of lic-lic for pieces of candy and cigarettes. [p 139 ] The next morning when Zarwell awoke he lay for a moment, unmoving. The feeling was there again, like a scene waiting only to be gazed at directly to be perceived. Zarwell moved among them, seldom taking part in the individual clashes, yet a moving force in the conflict . Zarwell was riding a shaggy pony outside a high wall surrounding the stricken metropolis. Zarwell was not the leader of the invaders, only a lesser figure in the rebellion.
output:  To forget memories that influence him to join more missions
options:  To forget memories that influence him to join more missions  To prevent a psychoanalyst from probing his memories  To disguise himself among civilians in a new society  To protect himself from corrupt government officials