Louis Pasteur's self-reproach made Jerome Bonaparte realize that the renowned scientist valued moral integrity even more than he had imagined. If it weren't for Jerome Bonaparte binding Louis Pasteur with his fervent patriotism, Louis Pasteur would not have been persuaded to conduct human experiments on death row inmates.
Even though Louis Pasteur's achievements in the field of typhoid and cholera far exceeded the acts he committed against those deprived of political rights, he still felt guilty for his actions. He would rather remain unknown than earn accolades with materials tainted by the blood of death row inmates!