With great authority Richard Nixon explains his view of constitutional law
Some other quotes which remind us of the need to control those who exercise power
Montesquieu - "When the legislative and executive powers are united in the same person, or in the same body of magistrates, there can be no liberty; because apprehensions may arise, lest the same monarch or senate should enact tyrannical laws, to execute them in a tyrannical manner."
Acton - "Power tends to corrupt, and absolute power corrupts absolutely. Great men are almost always bad men."
Chatham - "Unlimited power is apt to corrupt the minds of those who possess it"
Madison - "In time of actual war, great discretionary powers are constantly given to the Executive Magistrate. Constant apprehension of War, has the same tendency to render the head too large for the body. A standing military force, with an overgrown Executive will not long be safe companions to liberty. The means of defence against. foreign danger, have been always the instruments of tyranny at home. Among the Romans it was a standing maxim to excite a war, whenever a revolt was apprehended. Throughout all Europe, the armies kept up under the pretext of defending, have enslaved the people. "
But don't forget - “The tyranny of a prince in an oligarchy is not so dangerous to the public welfare as the apathy of a citizen in a democracy” Montesquieu