The title for this story comes from the Dutch philosopher Spinoza, who gave Part IV of his work Ethics the title Of Human Bondage, or the Strength of the Emotions. Spinoza makes the point that humans are held hostage by their emotions and that to free oneself from this captivity, one has to know one's aims in life and follow them. It is an apt title, as the novel is centred on the unconscious search of the main character, Philip Carey, for his path in life and the tribulations he faces in trying to find peace.