"The problem of evil, as it is presented in the modern world, is not a problem of motivation but a problem of thoughtlessness."

"The greatest evil is not now done in those sordid 'dens of crime' that Dickens loved to paint. It is not done even in concentration camps and labor camps. In those we see its final result. But it is c…"

"The only possible answer to the problem of evil is to refuse to participate in it."

"The only way to prevent evil is to think."

"The only way to escape the personal consequences of freedom is to give up the very freedom itself."