Clifford D. Simak 
Time is the Simplest Thing 

Without setting foot on another planet, people like Shep Blaine were reaching out to the stars with their minds, telepathically contacting strange beings on other worlds. But even Blaine was unprepared for what happened when he communed with the soul of an utterly alien being light years from Earth. After recovering from his experience, he becomes a dangerous man: not only has he gained startling new powers – but he now understands that humankind must share the stars. Hunted through time and space by those who he used to trust, Blaine undergoes a unique odyssey that takes him through a nightmarish version of small-town America as he seeks to find others who share his vision of a humane future. Blaine has mastered death and time. Now he must master the fear and ignorance that threatened to destroy him!