The Victim By Saul Bellow

Leventhal is a natural victim; a man uncertain of himself, never free from the nagging suspicion that the other guy may be right. So when he meets a down-at-heel stranger in the park one day and finds himself being accused of ruining the man's life, he half believes it. He can't shake the man loose, can't stop himself becoming trapped in a mire of self doubt, can't help becoming ... a victim.