This was precisely what St. Paul did in dealing with the gigantic cancer which was draining the forces, economical, political, and moral, of Roman society. He did not tell the slave that he was oppressed and outraged. He did not tell the master that to buy and sell human beings was a violation of the rights of man. But he inspired both of them with sentiments which rendered the permanence of the unrighteous relation between them impossible. To many a Roman it would have seemed nothing less than robbery and revolution to tell him "You have no right to own these persons; you must free your slaves." St. Paul, without attacking the rights of property or existing laws and customs, spoke a far higher word, and one which sooner or later must carry the freedom with it, when he said, "You must _love_ your slaves." All the moral abominations which had clustered round slavery,--idleness, deceit, cruelty, and lust,--he denounced unsparingly; but for their own sake, not because of their connexion with this iniquitous institution. The social arrangements, which allowed and encouraged slavery, he did not denounce. He left it to the principles which he preached gradually to reform them. Slavery cannot continue when the brotherhood of all mankind, and the equality of all men in Christ, have been realized. And long before slavery is abolished, it is made more humane, wherever Christian principles are brought to bear upon it. Even before Christianity in the person of Constantine ascended the imperial throne, it had influenced public opinion in the right direction. Seneca and Plutarch are much more humane in their views of slavery than earlier writers are; and under the Antonines the power of life and death over slaves was transferred from their masters to the magistrates. Constantine went much further, and Justinian further still, in ameliorating the condition of slaves and encouraging emancipation. Thus slowly, but surely, this monstrous evil is being eradicated from society; and it is one of the many beauties of the Gospel in comparison with Islam, that whereas Mahometanism has consecrated slavery and given it a permanent religious sanction, Christianity has steadfastly abolished it. It is among the chief glories of the present century that it has seen the abolition of slavery in the British empire, the emancipation of the serfs in Russia, and the emancipation of the negroes in the United States. And we may safely assert that these tardy removals of a great social evil would never have been accomplished but for the principles which St. Paul preached, at the very time that he was allowing Christian masters to retain their slaves, and bidding Christian slaves to honour and obey their heathen masters.