"Smithsonian's "Establishing Borders: The Expansion of the United States, 1846-48" with essay and lesson plans"

“The world has nothing to fear from military ambition in our Government.”

“Thank God, under our Constitution there was no connection between church and state.”

“No president who performs his duties faithfully and conscientiously can have any leisure. If he entrusts the details and smaller matters to subordinates constant errors will occur. I prefer to supervise the whole operations of the government myself rather than entrust the public business to subordinates, and this makes my duties very great.”

“Well may the boldest fear and the wisest tremble when incurring responsibilities on which may depend our country's peace and prosperity, and in some degree the hopes and happiness of the whole human family.”

“Although in our country the Chief Magistrate must almost of necessity be chosen by a party and stand pledged to its principles and measures, yet in his official action he should not be the President of a part only, but of the whole people of the United States. While he executes the laws with an impartial hand, shrinks from no proper responsibility, and faithfully carries out in the executive department of the Government the principles and policy of those who have chosen him, he should not be unmindful that our fellow-citizens who have differed with him in opinion are entitled to the full and free exercise of their opinions and judgments, and that the rights of all are entitled to respect and regard.”

“With me it is emphatically true that the presidency is "no bed of roses.”