Gregory VII,
Hujusmodi salutationis nostrae
“ Indeed they consider that if that man to whom one sheep is committed, under condition of his own death, did not want to return not only one hundred by the same agreement, but also that he is careful to watch it, by no means without fear, lest that one sheep somehow perishes, because as much as he should watch attentively, and moreover be afraid, that is how much he accepted care or power over many men. ”
