“Real mathematics must be justified as art if it can be justified at all.”
“No code of ethics and no effort are justifiable a priori in the face of the cruel mathematics that command our condition.”
“The end must justify the means.”
“A means can be justified only by its end. But the end in its turn needs to be justified.”
“All forms of madness, bizarre habits, awkwardness in society, general clumsiness, are justified in the person who creates good art.”
“We can no more justify using nonhumans as human resources than we can justify human slavery. Animal use and slavery have at least one important point in common: both institutions treat sentient beings exclusively as resources of others. That cannot be justified with respect to humans; it cannot be justified with respect to nonhumans—however “humanely” we treat them.”