Article 1, Section 8, Clause 12

Document 5

Adam Smith, Wealth of Nations, bk. 5, CH. 1, PT. 1

Men of republican principles have been jealous of a standing army as dangerous to liberty. It certainly is so, wherever the interest of the general and that of the principal officers are not necessarily connected with the support of the constitution of the state. The standing army of Caesar destroyed the Roman republic. The standing army of Cromwel turned the long parliament out of doors. But where the sovereign is himself the general, and the principal nobility and gentry of the country the chief officers of the army; where the military force is placed under the command of those who have the greatest interest in the support of the civil authority, because they have themselves the greatest share of that authority, a standing army can never be dangerous to liberty. On the contrary, it may in some cases be favourable to liberty. The security which it gives to the sovereign renders unnecessary that trouble-some jealousy, which, in some modern republics, seems to watch over the minutest actions, and to be at all times ready to disturb the peace of every citizen. Where the security of the magistrate, though supported by the principal people of the country, is endangered by every popular discontent; where a small tumult is capable of bringing about in a few hours a great revolution, the whole authority of government must be employed to suppress and punish every murmur and complaint against it. To a sovereign, on the contrary, who feels himself supported, not only by the natural aristocracy of the country, but by a well-regulated standing army, the rudest, the most groundless, and the most licentious remonstrances can give little disturbance. He can safely pardon or neglect them, and his consciousness of his own superiority naturally disposes him to do so. That degree of liberty which approaches to licentiousness can be tolerated only in countries where the sovereign is secured by a well-regulated standing army. It is in such countries only, that the public safety does not require, that the sovereign should be trusted with any discretionary power, for suppressing even the impertinent wantonness of this licentious liberty.

The Founders' Constitution
Volume 3, Article 1, Section 8, Clause 12, Document 5
http://press-pubs.uchicago.edu/founders/documents/a1_8_12s5.html
The University of Chicago Press

Easy to print version.