"In view of the present condition of the country, and especially in regard to the recent signal successes of the national arms promising a speedy overthrow of the rebellion, this House makes the following declaration of opinion concerning the institution of slavery in the States and parts of States engaged in the rebellion, and embraced in the proclamation of emancipation issued by the President on the first day of January, A. D. 1863: and also concerning the relations now subsisting between the people of such States and parts of States on the one side, and the American Union on the other. _"It is therefore declared_ (as the opinion of the House of Representatives), that the institution of slavery was the cause of the present rebellion, and that the destruction of slavery in the rebellious States is an efficient means of weakening the power of the rebels; that the President's proclamation whereby all persons heretofore held as slaves in such States and parts of States have been declared free, has had the effect to increase the power of the Union, and to diminish the power of its enemies; that the freedom of such persons was desirable and just in itself, and an efficient means by which the Government was to be maintained, and its authority re- established in all the territory and over all the people within the legal jurisdiction of the United States; that it is the duty of the Government and of loyal men everywhere to do what may be practicable for the enforcement of the proclamation, in order to secure in fact, as well as by the forms of law, the extinction of slavery in such States and parts of States; and, finally, that it is the paramount duty of the Government and of all loyal men to labor for the restoration of the American Union upon the basis of freedom.