evidence: Between stimulus and response, Frankl says, lies responsibility. Each individual has the power and responsibility to choose how to respond to whatever situation... [...] Because a chief subject of Frankl's book is the suffering he and others like him endured in Nazi concentration camps, he focuses on this particular stimuli. He says that each person's suffering is singular, as is how they cope with it. How we respond to suffering helps define who we are. [...] In a larger sense, what Frankl learned in the camps applies to all of life. What shapes our lives and gives them meaning is how we choose to respond to our circumstances.