 In his Commentary on the Book of Job he wrote that "All men are equal by nature but ... a hidden dispensation by providence has arranged a hierarchy of merit and rulership, in that differences between classes of men have arisen as a result of sin and are ordained by divine justice".He directed slaves to be employed by the monasteries as well as forbidding the unrestricted allowance of slaves joining the monastery to escape their servitude.Upon manumitting two slaves held by the Church, he wrote