The hard necessities of the times wrung out of reluctant patriots the admission of the rendition of slaves, but they would not by any reasonable construction of language, assert the natural right of property in slaves, and the propriety or benefit of its toleration in new States and Territories. It was bad enough to tolerate this evil in the old slave States, but it would be infamous to hand down to posterity a Constitution denying the self-evident truths of the Declaration of Independence. Toleration is not synonymous with approval, or existence with right. There is a most subtle error in the assumption of the indifference of the Constitution to freedom and slavery--that it advocated neither, but protected both. Certainly the framers of the Constitution were not automatons, or this instrument the accident of the throw of the dice-box. The great purpose of this instrument was to raise the revenue, and defend the country. Its end was to protect the liberties and command the respect of civilized nations. The old Confederation was to give way to the Federal Constitution. The independence of the United States had been achieved at a heavy cost. To say nothing of frontiers exposed, country ravaged, towns burnt, commerce nearly ruined, the derangement of finances--the pecuniary loss alone amounted to one hundred and seventy million dollars, two thirds of which had been expended by Congress, the balance by individual States. The design of the Constitution was to preserve the fruits of the Revolution, to respect State sovereignty, and yet secure a powerful and efficient Union; to have a central government, and yet not infringe upon the local rights of the States. It will, therefore, be seen that while the subject of slavery was earnestly discussed, and presented at the outset a great obstacle to the union of the States, yet it was thought, upon the whole, best to leave to the slave States the business of doing away with this great evil in such a manner as in their judgment might best conduce to their own security and the preservation of the Union.