We have felt but one class of these dangers exhibited in the contest waged by the Bank of the United States against the Government for the last four years. Happily they have been obviated for the present by the indignant resistance of the people, but we should recollect that the principle whence they sprung is an ever-active one, which will not fail to renew its efforts in the same and in other forms so long as there is a hope of success, founded either on the inattention of the people or the treachery of their representatives to the subtle progress of its influence. The bank is, in fact, but one of the fruits of a system at war with the genius of all our institutions--a system founded upon a political creed the fundamental principle of which is a distrust of the popular will as a safe regulator of political power, and whose great ultimate object and inevitable result, should it prevail, is the consolidation of all power in our system in one central government. Lavish public disbursements and corporations with exclusive privileges would be its substitutes for the original and as yet sound checks and balances of the Constitution--the means by whose silent and secret operation a control would be exercised by the few over the political conduct of the many by first acquiring that control over the labor and earnings of the great body of the people. Wherever this spirit has effected an alliance with political power, tyranny and despotism have been the fruit. If it is ever used for the ends of government, it has to be incessantly watched, or it corrupts the sources of the public virtue and agitates the country with questions unfavorable to the harmonious and steady pursuit of its true interests. We are now to see whether, in the present favorable condition of the country, we can not take an effectual stand against the spirit of monopoly, and practically prove in respect to the currency as well as other important interests that there is no necessity for so extensive a resort to it as that which has been heretofore practiced. The experience of another year has confirmed the utter fallacy of the idea that the Bank of the United States was necessary as a fiscal agent of the Government. Without its aid as such, indeed, in despite of all the embarrassment it was in its power to create, the revenue has been paid with punctuality by our citizens, the business of exchange, both foreign and domestic, has been conducted with convenience, and the circulating medium has been greatly improved.