The principal event of the month has been the opening of the second session of the Thirty-first Congress, which occurred on the second of December. Each House was called to order by its presiding officer. Hon. WILLIAM R. KING of Alabama in the Senate, and Hon. HOWELL COBB of Georgia in the House. The Message of President FILLMORE was transmitted to Congress on the same day. The state of public feeling upon topics connected with slavery, and the fact that President FILLMORE'S views upon the subject had never before been officially communicated to the country, gave to the Message even more than an ordinary degree of interest. After alluding to the death of General TAYLOR, the Message briefly sets forth the President's political principles and his views as to the proper policy of the government. In its foreign relations he would have the country regard the independent rights of all nations without interference, take no part in their internal strifes, and sympathize with, though it can not aid, the oppressed who are struggling for freedom. To maintain strict neutrality, reciprocate every generous act, and observe treaties, is the extent of our obligations and powers. In regard to our domestic policy, the President says he has no guide but the Constitution as interpreted by the courts, and by usage and general acquiescence. All its parts are equally binding, and no necessity can justify the assumption of powers not granted. The powers granted are as clearly expressed as the imperfections of human language will allow, and he deems it his duty not to question its wisdom, add to its provisions, evade its requirements, or multiply its commands. He promises to express his views frankly upon the leading subjects of legislation, and if any act should pass Congress, which shall appear to him "unconstitutional, or an encroachment on the just powers of other departments, or with provisions hastily adopted, and likely to produce consequences injurious and unforeseen," he would not hesitate to send it back for further consideration. Beyond this he will not attempt to control or influence the proceedings of Congress. The government of the United States is limited, and every citizen who truly loves the Constitution, will resist its interference in those domestic affairs which the Constitution has clearly and unequivocally left to the exclusive authority of the States: and every such citizen will also deprecate useless irritation among the several members of the Union, and all reproach and crimination tending to alienate one portion of the country from another. The Constitution has made it the duty of the President to take care that the laws be faithfully executed. Mr. FILLMORE says that Congress and the country may rest assured that, to the utmost of his ability, and to the extent of the powers vested in him, he will, at all times and in all places, take care that the laws be faithfully executed.