Time is the Simplest Thing
Author: Clifford Simak
 
And the creature spoke
Hi, PAL, it said, I TRADE YOU WITH MY MIND.
Blaine's mind screamed soundlessly in outraged surprise . . . for suddenly without warning he was a double thing - himself and this other creature. For one chaotic instant he saw as the creature saw, felt as the creature felt, knew what the creature knew. And at the same instant he was Shepherd Blaine, explorer, a mind from out of Earth and very far from home.
Bit this startling tale is not of Man on a distant planet. It is the story of a man on earth - who became a fugitive in a violent world of hate and fear. In his mind lurked an awesome ally, an alien creature who knew that - TIME IS THE SIMPLEST THING . . .
 
PAN BOOKS 1964 EDITION