“Mercer,” Rick said. “I am your friend,” the old man said. “But you must go on as if I did not exist. Can you understand that?” He spread empty hands… - Philip K. Dick

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“Mercer,” Rick said.
“I am your friend,” the old man said. “But you must go on as if I did not exist. Can you understand that?” He spread empty hands.
“No,” Rick said. “I can’t understand that. I need help.”
“How can I save you,” the old man said, “if I can’t save myself?” He smiled. “Don’t you see? There is no salvation.”
“Then what’s this for?” Rick demanded. “What are you for?”
“To show you,” Wilbur Mercer said, “that you aren’t alone. I am here with you and always will be. Go and do your task, even though you know it’s wrong.”
“Why?” Rick said. “Why should I do it? I’ll quit my job and emigrate.” The old man said, “You will be required to do wrong no matter where you go. It is the basic condition of life, to be required to violate your own identity. At some time, every creature which lives must do so. It is the ultimate shadow, the defeat of creation; this is the curse at work, the curse that feeds on all life. Everywhere in the universe.”
“That’s all you can tell me?” Rick said.