Such was the most prominent idea in his history; such the departures from it. Let us look at other events in his life. While President, the most important object of his administration was the promotion of internal improvements, especially the internal communication between the States. For this purpose the government lent its aid in the construction of roads and canals, and a little more than four millions of dollars were devoted to this work in his administration. On the 4th of July, 1828, he helped break ground for the Chesapeake and Ohio canal, thinking it an important event in his life. He then said there were three great steps in the progress of America. The first was the Declaration of Independence and the achievement thereof; the second, the union of the whole country under the Constitution; but the third was more arduous than both of the others: "It is," said he, "the adaptation of the powers, physical, moral, and intellectual, of the whole Union, to the improvement of its own condition; of its _moral_ and _political_ condition, by wise and liberal institutions; by the cultivation of the understanding and the heart; by academies, schools, and learned institutions; by the pursuit and patronage of learning and the arts; of its _physical_ condition, by associated labor to improve the bounties and supply the deficiencies of nature; to stem the torrent in its course; to level the mountain with the plain; to disarm and fetter the raging surge of the ocean."[31] He faithfully adhered to these words in his administration. He was careful never to exceed the powers which the Constitution prescribed for him. He thought the acquisition of Louisiana was "accomplished by a flagrant violation of the Constitution,"[32] and himself guarded against such violations. He revered the God of Limits, who, in the Roman mythology, refused to give way or remove, even for Jupiter himself. No man was ever more conscientious on that ground. To him the Constitution meant something; his oath to keep it meant something.