It has not been more than twenty-five years since Garrison was dragged through the streets of Boston with a rope around his neck, for uttering Abolition sentiments; and not thirty years since, the abolition of slavery was seriously debated in the Legislature of Virginia. Now, on the contrary, the radical opinions of Sumner, Emerson and Parker, and the assassination schemes of John Brown, are applauded in Fanueil Hall, and the whole Southern mind with an unparalelled unanimity, regards the institution of slavery as righteous and just, ordained of God, and to be perpetuated by man. We do not propose to analyze the causes of this remarkable revolution, which will constitute one of the strangest chapters of history. The fact is unquestionable. To understand rationally the events which are transpiring, and to forsee their inevitable issue, it is necessary to examine this element of discord between the Northern and Southern people, to investigate its true nature and extent, and weigh carefully the prospect of its cure. The Northern mind has become thoroughly anti-slavery in sentiment. Even those who contend for our constitutional rights share in the universal opinion that slavery is a great moral and social evil. Those who have adopted the pro-slavery view are exceedingly few in numbers, and are regarded by the mass of Northern people as more fanatical than the most extreme Abolitionist. The press, the pulpit, the rostrum of the North are clamorous with declamation against us and our institutions. Slavery is considered not only immoral but debasing to both owner and owned. It is, they say, a relic of barbarism and a disgrace to an enlightened people. We are not regarded as equals but are merely tolerated, as persons whom they in their wisdom may possibly reform and improve. Churches refuse us participation in religious rites, and a baleful element of religious hate adds fuel to the fire of political dissension. From present appearances, the North will before very long be unanimous in opinion, and if it has the power or can invent the means, it will be ready to reduce the South to the condition of Hayti and Jamaica, and expect the approval of God upon the atrocity.