Within a few years, there spread over the world so great a repute of Gregory's charity and equity that petitions rained upon Rome. Here a guild of soap-boilers asks his intervention in some dispute: there a woman who, in a fit of temper at the supposed infidelity of her husband, has rushed to a nunnery and now wants to return home, asks his indulgence, and receives it. From all sides are cries of oppression, simony, or other scandal, and Gregory is aroused. Jews appeal to him frequently against the injustice of their Christian neighbours, and they invariably get such justice as the law allows. The Zealots who have seized their synagogues (if of long standing--they were forbidden by law to build new ones) must restore them, or pay for them[84]; impatient priests who would coerce them into "believing" are rebuked. There is only one weakness--a not unamiable weakness--in his treatment of the Jews. Those who abandon their creed are to have their rents reduced: to encourage the others, he says cheerfully.[85] For the pagans, however, he has no mercy, as we shall see. He sanctions compulsion and persecution with mediæval frankness. It should be noted, too, that, while he approved the manumission of slaves, he never condemned the institution as such. Vast regiments of slaves worked the Papal estates, though the ease, if not advantage, of converting them into serfs must have been apparent. Still no slave could enter the clergy--lest, as Leo the Great had declared, his "vileness" should "pollute" the sacred order--and a special probation was imposed on slaves if they wished to enter monasteries: a wise regulation this, for many thought it an easy way to freedom. Still no slave could contract marriage with a free Christian, as Gregory expressly reaffirms.[86]